Kazuma Satou, Megumin, Devil king's daughter. Prologue to: The Iwatani Family.

Kazuma, Megumin, Aqua and Darkness had just defeated the demon king that threatened the kingdom of Belzberg. This totally discouraged the rest of his army and scattered it into pockets of unorganized mess, filled with powerful monsters that kept to themselves. One person with strong ties to the demon king was however not angry nor afraid of Kazuma after he killed the demon king. That was his daughter Medea. To put it simply she became obsessed with Kazuma. She wanted him all to herself, as she deemed anyone else's love towards him false or inadequate. Kazuma was offered a wish from the gods, he could wish for one thing without any strings attached. For now he had told them he would keep onto it until further notice.

Kazuma felt horrible at the moment. He didn't think he could feel so horrible, as he did at that very moment. He didn't like this huge clump of guilt that had manifested itself in his stomach. He and the goddess Eris and had just had sex, it had been amazing right then and there. They had just survived a dungeon that reversed all the stats of everyone that entered it except for intelligence, which meant that Kazuma and Eris had the worst luck, while in the dungeon.

Normally a goddess wouldn't be scared of such a situation, because they are immortal, but the dungeon had been built by an Axis cultist, and the designer had included traps that could kill even gods. Something Eris had discovered the hard way, when a bullet had shot across her right cheek giving her a nasty scar. Genuine fear of her life, had never really been a concern for her, but in that dungeon she came face to face with that harsh reality.

If it hadn't been for Kazuma's and Eris' intelligence mixed with Kazuma's wide area of skills they would probably both have died in there. After they had gotten out of the dungeon, Eris felt extremely attracted towards Kazuma and he felt the same way, since she had saved him more than once in there from a slow and painful death. So when emotions were high they had gone to bed with each other.

Darkness had also recently seduced him into having sex with her, but he excused himself with telling himself she forced her onto him. She had tried to do so two times before. The first time she didn't know how to rape him, so Kazuma tried to guide her through it, but Megumin and Aqua stopped them. The second time was when Kazuma had fallen asleep in the bathroom once again, and Darkness tried to seduce him. This was however also stopped by Megumin, when she came back home.

Currently Kazuma was walking around in the city pondering over if he should go and drink away his worries, or if he should go outside Axel and think. He decided on the latter. Kazuma just walked around outside Axel, without thinking much about where he went. After a few hours of just mindless walking he found himself near the castle, that had once been occupied by the Beldia. A former demon king general they had defeated.

(Why am I here?) Kazuma questioned himself, before he sat down and stared intently at the destroyed castle in the distance. His stare was kept on the spot that Megumin would cast her many explosions, back when they trained.

"Megumin what is the hold up, why aren't you…" Kazuma stopped as he looked to his right to see no one. He had gone here alone, without Megumin. Now he realized why he had gone here, this was the place he and Megumin had spent so much time together.

"I am sorry," Kazuma muttered to himself as he clutched at his heart, where he could feel something. He pulled on a string around his neck and revealed the amulet that Megumin had given to him. It was full with hair from all his party members, but it was Megumin that had made it for him. The amulet had always been on him ever since she gifted it to him.

He could feel a clump form in his throat and his eyes start get wet as he stared at the amulet his girlfriend had made for him. Here he stood in a place that he and Megumin had spent so much time together, with an amulet she had made for him. Guilt washed over him, as he started to cry his lungs out, while he fiercely clutched at the amulet, like he feared it would disappear if he let his grip waiver for even a second.

"I am… truly scum," he muttered to himself in-between crying.

"Why are you crying?" a beautiful woman asked timidly as she emerged from the woods. She had long red hair that reached down over her shoulders, with fair skin that gave of an aura of safety. She was wearing a usual outfit for a maiden, and didn't look threatening in the slightest. Her breasts had to have been at least a C-cup, not that Kazuma noticed that in his saddened state.

Kazuma looked up in response to the voice, his face covered in tears and snot. He tried his best to stifle his crying, as he wiped his face with his mantle. Before he stood up and observed the woman standing beside him, he put the amulet back under his shirt. "Who are you?" Kazuma managed to utter with a broken voice.

"I am Medea, and from what I have been told you must be the demon king slayer Kazuma Satou," she told him with a gentle smile.

"Yeah… that would be me," Kazuma confirmed in a dejected tone.

"Would you like to come with me for a cup of tea and talk about what has made you so sad?" She asked as she put her right hand on his left shoulder.

"Yeah, that sounds… nice," He agreed as he started to follow Medea to a little house made out of wood.

As they entered the house, Kazuma could smell newly baked cookies. Medea gestured for him to sit down at the table, while she went to the kitchen to prepare some tea. Kazuma didn't pick up any hostile intent from this woman, and he was also pretty out of it at the moment. When a couple of minutes had passed Medea came out with a couple of cookies, and some newly brewed tea.

"So, would you like to tell me why you were crying by yourself out in the middle of nowhere?" She asked as she took a sip from her cup.

"I wandered off on my own, and ended up there, as for why I was crying is a personal matter," Kazuma responded with as he took a sip of the tea, and ate a cookie. The tea was a little bitter, but it helped him to relax, while the cookie was sweet and gave him back some much needed energy.

"Could it be that you are crying over a girl?" she asked as a little glint flashed in her eye

"You are an astute observer, and yes I am crying because of something that happened, between me and some female friends of mine." Kazuma answered in a tired tone as he took a big sip of the tea.

"Please tell me what happened, I won't judge," Medea said as she put on a comforting smile, and took a firm grip of his left hand.

Kazuma recoiled at this action, he didn't want to hold hands with anyone right now. Kazuma then took a closer look at her eyes and shot up from his chair as he looked at her with fear clearly showing on his face. Her face looked innocent enough, but the emerald green eyes he was staring into was filled with the same lust he had seen present in both Darkness and Eris. However, this lustful gaze felt… wrong. The gaze was more similar to a predator looking at its food, than a woman staring at her crush. It was like the hungry stares the female orcs had given him, when he had first visited the crimson demon village.

"Is there a problem Kazuma?" She asked as she tried to get closer to him.

"Get away from me!" Kazuma yelled out with, which came out very pathetically because of his sore throat as he drew Chunchunmaru.

"It is ok, you will soon feel better," She calmly informed him as he started to feel drowsy.

"Yohuh, dhruhgged mmhe," Kazuma managed to utter as he felt his grip on reality slip away, first he dropped Chunchunmaru to the ground, since it felt like he was lifting a big bag of flour and not his handy little katana with the weird name, given to it by Megumin. As Kazuma dropped to the floor the last word he managed to utter was, "Megumin." Before he fell to the effects of the drug that had been put in the cookies. Just before he hit the ground Medea caught him, and carried him to her bed.

When Kazuma woke up he was bound to the bed with a magical leach. He tried to pry it off, but it didn't work no matter what he tried. He tried to teleport away, but that didn't work either. He tried to use {Drain touch} on the leach, but he only felt weaker after trying to do that, while the leach felt stronger.

"Ah, you are awake darling," Medea said in an overly sweet tone as she appeared in the room carrying two bowls and a steaming pot. "I prepared some stew for us, here you go sweetheart," she said to Kazuma like they were a married couple, which freaked him the fuck out.

"What did you do to me?" he asked in a seriously frightened tone, as he backed away from the woman in front of him.

"It is fine darling, I know you are afraid since that witch has brainwashed you, but I promise you are safe now," Medea said without a trace of deceit showing in either her eyes, or facial expressions. She truly believed what she was saying.

(This bitch is trying to gaslight me!) Kazuma yelled inside his head.

"Here eat up now, you need to regain your strength so we can make an heir," Medea said as she pushed the bowl with stew towards him.

"What do you mean by an heir?" Kazuma asked as he already he knew the answer.

"Hehe, you are such a pervert. You know it is embarrassing for me to say it out loud, but I will humor you since you just got back to me, an heir to the throne of the devil king of course, and to do that we have to have… sex." She informed him as she started to blush profusely, like a timid girl.

"I am sorry to burst your bubble, but I defeated the devil king." Kazuma informed the delusional woman offering him stew.

"Yes, you killed my unworthy father as you saw a better way to rule and took me as your wife, but then an evil witch with the help of a crazy axis archpriest and a perverted crusader caught you, took you away from me and brainwashed you." Medea said with absolute conviction.

(This crazy bitch is the devil king's daughter, he seemed like a mostly chill dude, why the fuck is his daughter such a nutjob. I know Aqua is stupid and not crazy, Megumin isn't evil she is the most sane person beside me in the party, but I can't argue with Darkness being perverted.) Kazuma thought to himself as Medea spouted this crazy nonsense.

"Are the memories coming back to you darling?" she asked as she gave him a hopeful smile.

(I should play along for now, then try to find a way to escape.) "Yeah, they are coming back to me. Could you please remove the restraints I have on me, darling? They are starting to get itchy." Kazuma did his best to try and play along with Medea's fantasy.

"Even when you are brainwashed you are so cute when you try to trick me," Medea said with a genuine smile on her face.

Kazuma looked on in shock, this woman was both perceptive and crazy, or her insane world view went further than he thought.

"I of course know I have to kill the person that brainwashed you before I try to fix your mind or else I might cause irreparable damage," Medea said that extremely frightening fact with an unfitting smile. Her face said "My boyfriend just said something really funny/silly," not "I am going to kill the woman you love."

"No wait a…," he tried to say before Medea cut him off.

"Don't worry I have a method that kills people in such thorough way that not even resurrection can bring them back, hell the soul might also take permanent damage. But I think it is a fitting punishment for taking my love away from me, and brainwashing him." Medea said as she adorned a more serious expression.

(WTF!) Was the only thing Kazuma could think as he listened to this crazy lady.

"First, I just have to kill her in any way possible, for her to then be resurrected, then after that I need to torture her until her mind finally breaks. Then after that I need to suck out all her mana and life energy slowly. Then after she has died I need to burn her body, then I need to carry the ashes to different places. That way there is no possible way to resurrect her, and if I broke her mind properly she shouldn't be able to manifest a soul either." Medea happily informed him about the gruesome way she was going to kill Megumin, wearing a big smile. Similar to a lover having found a cure for a severe illness, and informing her lover about the cure.

"NO!" Kazuma screamed as he jumped forward to try and pounce on Medea, but she was too quick and easily avoided his amateurish attack.

"It truly hurts me to see my one true love like this, but it will soon be back to normal. I promise you that." Medea said as she wore a face that communicated both sorrow and hope.

"Here I will show you my plan on how to do this, just sit tight," Medea said in a more uplifting tone as she pranced out of the bedroom.

Kazuma then checked for his amulet, he needed to have it on him. It was the only thing that could get him out of this mess, and as luck would have it Medea had not discovered the amulet under his shirt. He let out a sigh of relief as he clutched it tightly and started to chant inside his head.

({Spell break}{Spell break}{SPELL BREAK!}) The third time he thought of the chant, he could feel the hold around his arm, neck and feet reside. He was free, but now he needed to play the part so he could find an opportunity to turn the tables on her, and secure the safety of his girlfriend.

"Hey darling I am back, and I brought everything I am going to use for the plan," Medea said in a cheerful manner as she wheeled in a trolley with three levels. On the first level was different torture weapons, on the second level he could see energy potions and on the third floor was healing potions.

"What are you going to do with all of that?" Kazuma asked as he tried to point at the trolley, but was seemingly stopped by an invisible leach. He feigned being restrained perfectly.

"This is all needed for the second part of the process," she said as she gestured to the trolley. "But first, I will use this to kill her," Medea said as she pulled out a bottle with a murky black liquid in it. "And then this to resurrect her with," she pulled out a bottle with a golden liquid in it and placed them both on the trolley.

"How long have I been asleep?" Kazuma asked as the thought hit him.

"Well, it would have taken seven days for you to wake up from one cookie, but since you ate two and you were tired from before you instead slept for 21 days"

(21 days, I have been gone for over 21 days, either they are worried sick about me or they think I have left them behind and hate me right now) Kazuma frantically thought, as he remembered how much drama it had been about him being gone for only a week.

Kazuma the got an idea in how he could escape as he saw no rope on the trolley. "Are you not going to bind her with something, you know she is really strong, right?" Kazuma asked as he gave her a smug grin.

She then drew closer to him as she stared intently at him, "Fight against the brainwashing my love, I know you can do it." Medea yelled to him in desperation like she was trying to contact someone inside him, unfortunately for her, the only person that resided in Kazuma's head was himself and he was not about to be a puppet, for a crazy puppeteer, again.

Medea sighed out dejectedly as she realized her "man" wasn't available. "I will go and get some strong ropes, so strong in fact that not even a Fenris wolf can break loose from them." She stated in a prideful manner as she left the room.

Kazuma acted quickly, first, he casted {illusion} on the bed to create a fake image of himself, he then picked up the two potions and created an illusion for each of them. Lastly, he activated {Lurk} and vanished into a corner.

(She can't kill Megumin, if I kill her first.) He thought as he readied himself for the battle that would take place in this room.

When Medea returned she sensed no danger, everything was as she had left it. She was carrying a bundle of ropes in her arms.

"{Bind}" Kazuma yelled as all the ropes Medea was carrying tightly wrapped themselves around her making her fall to the ground. Kazuma then jumped on top of her as he opened the bottle with black liquid and poured it into her mouth.

"cough, COUGH, HEEH, EEH, UH, GURGLE!" Was all Medea was able to utter as she started to violently choke, and twist around on the floor. When her body finally went limp, Kazuma waited an hour just to make sure she was truly dead. He continuously checked for pulse or any signs of her being alive, but he found none. He then tied her more securely to the bed and made sure she couldn't move even a millimeter.

"Here it goes," Kazuma said to himself as he poured the golden liquid into her mouth.

The moment the last drop of the potion touched her lips her eyes flared open as she frantically looked around. Her eyes finally resting on Kazuma. "My love have you broken free of the brainwashing and come back to save me?" she asked in a hopeful tone.

"You will die now!" Kazuma sternly informed her as he picked up a drill, and was about to do the most gruesome action ever. He placed it on her stomach, she caught his eyes for a brief moment. She was silently pleading with him not to do this, he could stop now and she would forgive him.

"For Megumin's safety!" he yelled as he started the drill, Medea gave off an agonizing scream for every second of the torture. He only stopped when he with shaking hands grabbed another potion, to either keep himself or Medea awake, as well as needed to heal her wounds just to reopen them shortly afterwards. After hours of this treatment, Kazuma couldn't tell if he had many any progress at all. He sat down in a chair and grabbed his head with trembling hands, as he breathed frantically.

"It is ok, I will love you even if you kill me here." Medea said with a brave smile showing on her face.

Kazuma couldn't take this torture anymore, he hated every second of this. He then grabbed Chunchunmaru and cleanly chopped her head off. He then readied a fire outside where he could burn the body to ashes. He hated every second of this, he hated the smell, he hated the view he couldn't look away from, but most of all he hated this situation. But he loved Megumin more than he hated any of these things, so he proceeded with it regardless. He then did the last thing he needed to do, he fed the ashes to different animals, and spread all the ashes far away from each other.

"I am done," Kazuma uttered as he fell asleep on the ground from exhaustion, after spreading the last of the ashes.

Hours later an adventurer party came upon the sleeping Kazuma, and carried him with them to the capitol, where they delivered him to the royal house. After confirming it was indeed Kazuma they had found, they were payed the 300 000 000 Eris reward that had been set out to find him. In the meantime Iris contacted Megumin, Darkness and Aqua about them finding Kazuma. Megumin, had gotten there before she even sent the message, because she had been frantically teleporting between the capitol and Axel the last 10 days. The moment she had arrived, she wouldn't leave his side not even for a moment. When she first saw her boyfriend she couldn't stop crying tears of joy. She was unbelievably relieved and happy.

"Idiot, where were you!" Megumin screamed at the sleeping Kazuma, as tears streamed down her face.

Darkness, felt extremely guilty when she arrived the next day to see Megumin sleeping so peacefully by his side. She had taken his chastity from him, and she couldn't change that, other than feeling extremely guilty for what she had done.

On the third day of Kazuma still being asleep, Chris and Aqua showed up to take a look on him. Chris wore the same guilty expression that Darkness did when she arrived and saw how Megumin desperately clung onto him, for some weird reason. Aqua casted heal on him, which fixed him up pretty well. But he didn't wake up before the clock was way past midnight.

"Huh, where am I?" He asked in a groggy tone as he felt someone holding his right arm tightly. When he looked over to see Megumin sleeping tightly by his side, he thought he was dreaming so he had to pinch himself. After confirming that this was indeed no dream he gently woke Megumin up.

As Megumin groggily woke up she thought she also was dreaming, because Kazuma was awake beside her, but that didn't matter to her right now either way. If it was a dream, she was going to enjoy it to its fullest, and if it wasn't a dream she could die happy right then and there knowing he was safe.

"Kazuma, KAZUMA!" She screamed at the man beside her.

"Yes, I am Kazuma," he answered in a monotone tone totally ruining the mood for this reunion, which made Megumin even happier, because then he really was awake, and she wasn't dreaming. So she asked the same question she had asked when she had first arrived, as she took a firm hold of Kazuma and started to shake him violently.

"Where were you, do you have any idea of how worried we have been, how worried I have been?"

"Megumin, I love you," he calmly stated as he gave her a warm and genuine smile. Megumin in response stopped shaking him and stared into his eyes as her eyes flared up red from all the emotions she felt. She then hugged him as tightly as she could.

"Never leave me like that," Megumin said as tears started to stream down her face.

"I promise." Kazuma confirmed as he wrapped his arm around her returning the embrace.

They stayed like that until they fell asleep. When Iris arrived early in the morning she could see the way Megumin and Kazuma had intertwined their arms and legs to keep each other close, and she was jealous like hell. She instantly went over to Megumin and started to untangle her from Kazuma, since she still believed he was in a coma. The first one to wake up from Iris' interference was Kazuma.

"Huh, what are you doing Iris?" he asked in confusion as he saw Iris pulling his left leg out of Megumin's intertwined right leg.

"Eh, you see I thought, oh never mind that," she said as her face grew red and jumped on Kazuma to give him a big hug. "I missed you," she informed him in a relieved tone as she held him tightly, a hug he promptly returned.

"Good to hear," he said as he proceeded to chuckle lightly at the princesses antics.

"Kazuma, care to explain what Iris is doing in our bed?" Megumin asked as anger was present in her voice.

"I just woke up Onii-sama," Iris declared with a bright smile that Megumin couldn't stay angry at for long.

"Iris, could you leave me and Megumin alone for a few minutes?" He gently asked

"Yeah, sure I can do that, but you have to spend time with me afterwards," Iris demanded as she held his hands firmly awaiting an answer.

"Ok."

When Iris had left the room, Kazuma got off the bed and started to prostrate himself in front of Megumin. First he told her about the sex with Darkness, which she clenched her fist at in both anger and jealousy, then he told her about the sex he and Eris had. She bit down on a pillow to hide her angry screams. Lastly he told her about the kidnapping the devil king's daughter Medea had performed on him, how she had captured him, how she was a totally delusional person, what she had planned to do to her, and lastly what unspeakable acts he had done to make sure she was safe.

After Megumin was certain that was all he wanted to confess, she asked him to rise and stand before him, which he promptly did. She then stared blankly at him, before she slapped him across the face.

"That is for having sex with Darkness," she angrily yelled at him.

(I deserve that one.) He thought to himself as he turned back to stare into the angry eyes of Megumin.

She then proceeded to smack him as hard across the other cheek. "That is for cheating on me with a goddess," her eyes shining brilliantly red as she said that.

(I deserve that one too.) He thought to himself.

"And this one," she raised both her hands towards Kazuma before she violently smacked each hand into their own cheek and pulled him into a deep kiss, which he promptly returned, without hesitating for once. When they broke the kiss Megumin sensually whispered to him "Is for going through all that, just to keep me safe."

Megumin then promptly pulled him down to the bed as she straddled her legs around him, and pulled him into another deep kiss. She then proceeded to undress him like she had done every time he needed to clean him over the past days. She efficiently took off all his clothes in an impressive speed, especially since she was at the bottom. Kazuma took the easy way out and just used steal to quickly undress her, first he got her black panties, then her bra. It seems steal likes to prioritize the underwear, when Kazuma uses it. After a few minutes of intense kissing, undressing and {Stealing} they looked at each other panting heavily.

"Are you sure you want this Megumin?" Kazuma asked politely.

"I want you Kazuma, all of you!" Megumin declared as she pulled him closer to her. She could feel "Excalibur" knocking on her door.

"I will do it slowly," Kazuma said as he slowly started to sheath "Excalibur" into the person that had once named it just that.

"Ah," Megumin moaned slightly as she could feel "Excalibur" slowly going inside her. Kazuma then pulled his girlfriend into a deep kiss as he picked Megumin's flower, by inserting the full length of "Excalibur" into her cave.

Kazuma could no longer hold back as he let out his own explosion into Megumin. She in return just pulled him closer when he stopped moving. She wanted to be as close to him as possible for their first time together.

"HEY I HEARD YOU WERE AWAHHH!" Aqua screamed as she suddenly burst through the door, just to leave as she quickly as she saw the couple "Hugging passionately."

Kazuma and Megumin started to laugh profusely as Aqua slammed the door shut behind her. Before they stared at each other and in unison said "I had a better explosion than you."

Aqua stormed out of the door where she met Chris and Darkness talking together, she needed to tell them as quickly as she could. "Kazuma and Megumin were having sex, can you believe that someone would actually have sex with that hiki-neet," she mockingly stated.

"Yeah, who would ever do that," Darkness and Chris muttered in unison as Darkness stared at her own feet, while Chris nervously scratched the scar on her right cheek.

Aqua one day declared that she had to return to heaven since they had successfully defeated the devil king. This made Kazuma feel rather unsafe so he went to talk to Megumin about what they should do.

"Megumin, I can wish for us and our children to live a safe and peaceful life back in Japan, but that would mean you would need to give up explosions, and we can't see our friends from this world that much anymore" Kazuma informed her with a serious expression.

Megumin stared at her staff, then back her boyfriend before she made up her mind. "If you marry me, I will give up anything for you and our family," she said as she got down on one knee and presented him with a golden ring with a green gem imbedded into it.

"Hey that was supposed to be my line," Kazuma said annoyed as he got down on one knee and presented her with a golden ring with a red gem imbedded into it.

And then they lived happily in Japan, with a few ups and downs, until their eldest son Naofumi disappeared one day, they tracked him down to another world, after they accidently activated the same summoning magic. But that is another story.

Well I really hoped you liked this backstory I created for my main story "The Iwatani family". If you liked this then make sure to go over and check that, this is just a simple one-shot that I wanted to make.