Author's note: So I recently finished reading Konosuba and was disappointed with how it ended without any Kazumin moments. I know this series is mainly a comedy, It still didn't sit well with me.

2nd note: I surfed through the Internet trying to find fanfiction of the night the gang brought Aqua back but to my surprise, I couldn't find any! So I took it upon myself to write this.

3rd note: I do know they probably didn't do the deed as in one of the short stories, Megumin said they haven't done it yet much to my disappointment. But after all the build-up I just couldn't help myself.

4th note: Do keep in mind that this is my first time trying to write fanfiction. So if you see that there's something to criticize me about do not show mercy! I want to know what I'm doing wrong and improve my writing skills!

5th note: I wrote this while trying to stay as close to the original as possible. Man was that difficult! Trying to write Kazuma's thoughts on everything was very hard for me for some reason.

6th note: Spoilers ahead so make sure to read the light novel before reading this!

Final note: Enjoy!

After defeating the Demon King, Yunyun teleported us back to Axel.

As we walked through the gates, I couldn't help but feel a certain blonde crusader's gaze on me.

"Oi stop staring at me."

"Kazuma, did you really defeat the Demon King?"

I looked at Darkness with a questioning gaze.

"Uhm yeah why do you ask?"

"N-nothing! I'm just surprised is all…"

I can clearly tell that she's lying with that disappointed look of hers.

'Oi stop lying you masochistic pervert. You are definitely sad about not being able to satisfy that stupid fetish of yours now that the Demon King is gone."

"N-no that's not it at all!"

How can she lie like that while blushing and panting with a smile on her face?

"Whatever."

"It is really surprising that you of all people defeated the demon King, to be honest."

"Oi are you implying that I'm weak?"

"Are you not?"

This woman!

I can't even retort since she's not wrong about that!

"Don't make fun of me Darkness. I have learned tons of skills and won't hesitate to use them on you just because you're a woman."

"I-I wouldn't mind..."

This woman is utterly hopeless.

"Get away from me."

As I pushed Darkness to the front where Megumin was, Aqua came up to me.

"Kazuma Kazuma."

"What is it?"

"Is it okay for me to ask a personal question?'

"Shoot."

"Are you and Megumin going to fulfill that promise she made with you?"

She asked me such a question with a serious face.

Wait a minute.

"O-oi! How do you even know about that?! Were you secretly spying on us while you were away? Actually, how would you even do that? Aren't you the useless goddess of party tricks?"

"Of course not you idiot! Eris did tell you that she looks over all didn't she? As her senior, she would of course tell me such a thing if I demanded it! And besides, I've been living with you guys for 2 years now, even I could tell something is going on with you two."

So Eris does spy on us. Next time I see Chris I'll use steal on her. But more importantly...

"Aqua… did your intelligence stats finally increase?"

I stared at her with tears rolling down my face.

"How dare you say that to me! My intelligence stats might be lower than average but I'm not oblivious!"

"I'm so proud of you…"

"Hey stop this or I'll punish your lower half with Divine Retribution so that you will never be able to get it up ever again!"

"O-oi! I get it so stop chanting!"

"Hmph! Anyway, you didn't answer my question!"

Who does this useless goddess think she is poking her head in someone else's relationship?

"Why should I answer you? This is my private love life we're talking about so go bother someone else."

"How annoying! You are talking to the most beautiful goddess right now so how dare you treat me like an extra?! Treat me with respect you shitty NEET!"

"Yeah yeah, I get it so shut it! I'm a little tired right now."

"Hmph! Well if Kazuma and Megumin ever have children together, I'll give them a goddess's blessing and protect them."

Who are you and what have you done to Aqua?

"Uhm...thanks I guess."

As we walked side to side peacefully. I could faintly hear Darkness and Megumin squabbling about breast size for some reason.

...

"Lolicon NEET."

"Oi."

- As we walked through the streets of Axel. People were already congratulating us for defeating the Demon King.

How does news spread like this so quickly? The Demon King was defeated not long ago and the only ones who know about it are our group, Matsurari, and his harem.

Well, whatever.

"Hey guys you all go back home first, I have something to deal with."

"Oh? What could Kazuma possibly have to deal with right now? We defeated the Demon King so can't you do that after we celebrate?

"First of all Megumin. I defeated the Demon King, not we. And I don't want to have a party today, I don't know about you guys but I'm exhausted right now and don't want to celebrate until tomorrow."

"Well, I guess you're right. But that doesn't explain why you can't leave whatever it is you want to deal with for tomorrow?"

"Well-"

"Don't tell me you're going to that cafe you guys like so much. Could it be that you forget the promise I made you?"

"O-oi, how do you know about the cafe? And no I didn't forget, that stunt you pulled made me lose so much sleep so how could I forget about such a thing? I hope you're going to keep your word Megumin, otherwise, I'll have to use steal to punish you."

Megumin blushed a little after hearing this.

"P-please don't Kazuma-san. I already said I'm fine with it as long as you take responsibility. So there's no reason for me to go back on my word."

Hearing her say stuff like this without hesitating made my heart skip a beat, so I couldn't help but blush myself.

"O-oh, I see…"

I completely forgot about the other two girls who are looking back at us.

"Hey Darkness, we should let them have their fun tonight. We've been interrupting them for some time now."

"E-eh?! What do you mean we've been interrupting them?!"

"Don't mind that, just don't look for either of them tonight you hear me?"

"O-okay…"

When I looked back at those two, they quickly turned away.

I noticed that Darkness was blushing like crazy. What the hell were they talking about?

"Well you guys go on ahead, I'll be back before dinner. I'll grab Zell and Chomusuke from Wiz's on the way."

- After a while of walking, I've finally arrived at my destination.

'Wiz's Magic Shop'

As I walked in, the first thing that greeted me was the smell of a burnt Wiz.

The second thing that greeted me was none other than-

"Welcome! dear customer of Moi who is patiently waiting for night time to come as the crazy explosion mage with a loose screw promised to finally cross the line! And now said brat's mind is filled with that promise! Welcome!"

"O-oi! My mind is not filled with that!"

What's the point in even lying to this devil?

"So what did you do to Wiz this time?"

"Moi had to stop the idiot shopkeeper from buying more useless items with the money Moi made from selling thee all those manatite, seriously Moi is about to throw her out of this store if she keeps-"

"Alright, I don't want to hear about your problems. Anyways… since you're the 'devil with all-seeing eyes', I don't have to explain why I'm here."

"Of course! Thou is looking for a product that prevents pregnancy! Even though the brat told the screw loose demon girl that thou have money and will be able to live a good life!"

"Mwahahahahahahah! These emotions are indeed very delicious! Listen here brat, this is a magic store meant to sell adventuring items, but since thou is a dear customer of Moi, I have prepared this one of a kind potion for thee for free as thanks for buying all those manatite!"

As Vanir said that, he took out a purple-colored potion and handed it to me.

"Oi, what does this potion contain exactly?"

"Thou does not need to worry, this potion prevents sperm cells from fertilizing eggs, no side effect whatsoever! Thou has Moi word."

I hesitantly took the purple potion.

"Alright, I'll trust you on this Vanir, if something happens to me I'll have Aqua purify you."

I walked out of the store.

"Now how will Moi handle this idiot shopkeeper?

I feel bad for that lich.

- After requesting the guild to postpone the celebration party to tomorrow. I bought some groceries and headed back to my mansion.

As I opened the door, the normal scene of Megumin and Darkness playing that board game while Aqua slept lazily on the sofa greeted me.

"Explosion!"

"Argh! This is why that spell should be banned!"

"Hehe! My name is Megumin! The most powerful mage in the whole world! Such a weak defense is no match for me!"

I walked up to them.

"I agree with Darkness Megumin. That spell is broken."

Megumin looked at me with a confused look on her face.

"Broken? I don't understand what you're saying."

Whoops, I was talking in gamer language.

"Ah, that's just how people of my world describe something that's overpowered."

"Oh, I see."

"Well, I'll be off to the kitchen to cook dinner now. We'll be having lobster to celebrate our victory!"

"Oh I have never seen you cook lobster before, can I help?"

"If you want to."

As we were having a conversation of our own, Darkness looked at us.

"Well, I'll be waiting with Aqua then."

- After we decided on who should do what. We started cooking right away.

While the lobster was cooking, I was preparing a traditional lobster sauce.

"Kazuma what type of sauce are you making? I've never seen a sauce like this before."

"What are you talking about? Are the people of this world stupid? This is a lobster sauce my family used to make, it's easy to make and delicious."

"So you combine butter, lemon juice, and garlic to make it? Is it really that delicious?"

"Yeah, I'm surprised the people of this world don't know of this recipe."

"You know, you can be very smart without realizing."

What is this girl on about? This recipe is known worldwide in my world. But she is complimenting me so there's no reason to say that!

"I-is that so? W-well my strong points are my brains so that's no surprise!"

Seeing me all flustered, Megumin giggled slightly.

"That is one of the things that make you attractive to me Kazuma. Sometimes I see you working on your weird inventions in the living room with a serious expression on your face. Those are moments where you look your coolest Kazuma."

How does this girl say such things without hesitation? Stop it, you're making my heart melt.

"W-well… you sometimes have your cool moments too… like that one time where you… where you uhm… casted explosion on the enemy… uhm…"

"... Is that your half-baked attempt at complimenting me? If you're going to compliment someone, think before you say anything."

Megumin looked at me with utter disappointment like she's looking at a child.

"I-I'm sorry…"

"If Kazuma is sorry then Kazuma should focus on the lobsters because they look like they're about to fall out of the pot."

"Fuck!"

- After we finished cooking and ate our dinner, I decided to head to the bath early in preparation for tonight. But before I could walk into the bathroom, I saw Megumin down the hallway holding a change of clothes as well.

"O-oh, are you going to take a bath? I-I don't mind letting you go first since I'm such a gentleman!"

Megumin looked at me with a sly smirk.

"If I remember correctly, you said you were 'an advocate for true gender equality' and invited me to get in the bath with you. So why are you being docile now?"

This loli!

"Let's get in together then."

"W-wait Kazuma! Why did your attitude change all of a sudden?! I did say you invited me back then but why are you being so aggressive right now?!"

"I already told you, I'm an advocate for true gender equality and won't hesitate to get what I want. And right now I want to take a bath with you."

Although I put up a tough front. My heart is actually beating like crazy right now. One tiny push is all it will take for me to turn into a blushing mess.

"Well… I was going to invite you to bath with me anyway, so I have no reason to refuse."

Ah.

"Wait are you sure?! I know you said you'd keep your word but you don't have to force yourself you know?"

"Dummy. I already told you I'm fine with it, didn't I? And to be honest… we never actually got to cross the line in all the times we tried so I'm a bit pent up as well…"

...

"Say something, you idiot! Do you know how embarrassing it is to admit that?!"

"A-ah! Sorry… that caught me by surprise is all…"

Great, now both of us are blushing like crazy.

Megumin looked at me with glowing eyes.

"Should we get in now?"

"Y-yeah…"

- We were currently in the changing room.

"Don't just stand there and watch me undress. I-It's embarrassing…"

There's a reason I'm not undressing. In normal conditions, I would've already been in the bath, but right now, because I haven't relieved myself yet, I'm super turned on.

"Hey, Kazuma do you hear me? Kazuma is probably thinking about lewd things right now."

"O-oi, that's not true at all!"

I was thinking of lewd things.

"You don't have to lie to me Kazuma. That bulge in your pants already answers my question."

"W-well I can't help it, I'm a healthy teenager so it will be weird if I didn't have this reaction…"

"I never said I had any problems with your reaction. It actually makes me quite happy…"

"Y-you are a beautiful girl after all so of course I'd be excited… um, should we use towels?"

"N-no, I want us to be intimate without any restrictions."

Don't say such things while blushing like that! If you do that my lower half will start chanting explosion magic!

Without letting me prepare, Megumin took off everything except her panties.

O-oi!

Her brown hair flows down nicely to her shoulders, her crimson eyes glow under the dim light of the bathroom. Her body was petite. On her chest were A-Cup sized breasts with light brown perky tips. Her lower body is curved slightly. Completing the image. Her small thighs look smooth and soft, fitting her slender body perfectly.

Beautiful, absolutely beautiful.

I am a guy who likes big breasts. But when it comes to Megumin I just don't care. I guess such trivial things don't matter when it comes to the person you love.

"Please stop staring Kazuma, it's embarrassing… I know my body isn't that great to look at-"

"Don't sell yourself short Megumin. I think you look very hot. A-and I'm turned on."

"W-well I know you like girls with big breasts so I can't help it…"

"Megumin, I didn't fall in love with you because of your body. I fell for you because of you. When I first met you you were just an annoying chuuni brat with strange quirks who forced herself into my party. Going with you on your explosion walks were a choir at first. But after a while, I started to understand you more. Your dedication to explosion magic is something I admire about you. Your chuuni tendencies although sometimes can be a bit much, I can't help but find it cute."

Megumin stared at me with wide eyes and a gaping mouth.

"So what I'm saying is… I don't need you to have a voluptuous body. In fact, I don't want you to have one because this Megumin is more than enough for me."

Ah crap. Did I somehow mess this up? Did I say something I shouldn't have? Damn it! I was looking forward to tonight as well but now I screwed up!

Megumin seeing my expression turn from honest to panic, smiled shyly.

"That was a better compliment. I could tell it was from the heart. You didn't stutter once which means you meant everything you said. I give it 90 points."

Eh?

"Kazuma's lower body is still clothed. Do you want me to help you undress?"

"U-uhm! If you don't mind then yes."

She began to walk timidly towards me. When she was right in front of me, she started taking my belt off. Once she was done, she effortlessly took off my pants and within moments I was in the same state as her.

"A-alright Kazuma. Let's not waste any more time."

Just being undressed by Megumin already sent my nerves flying. I don't think I can resist the urge for much longer.

I gave her a nod and both of us started stripping. Not too long after we were completely naked.

I couldn't help but stare at her most feminine part. A slight patch of hair covered the front part of her crotch. The skin around her slit was slightly pink instead of a pale color like the rest of her body.

While I was admiring the view, Megumin was also staring at my most masculine part. It was slightly twitching with small amounts of clear liquid coming out from the tip.

"Do you like what you see, Kazuma?"

"I do... You're very pretty Megumin. Let's get inside the bath now."

- After we got into the bath. We sat down beside each other without saying anything. It felt a bit awkward. We sat there for a minute or two. But then, Megumin suddenly stood up and walked in front of me with her back facing me and sat down between my legs.

'Oi Megumin! If you do something like that all of a sudden I won't be able to control myself!"

"Can Kazuma touch me? There's no point in sitting around doing nothing you know?"

"Are you sure?"

Megumin gave me a slight nod of confirmation. I slowly wrapped my arms around her stomach and placed my hands on her small mounds.

As I did that Megumin's breathing started getting sharper.

I squeezed slightly and heard a light moan come out of her mouth. With newfound confidence, I started massaging her breasts by moving in a circular motion while squeezing a bit here and there. As time went on I felt her nipples become erect so I pinched them slightly while maintaining the massage.

I'm thankful for all the porn mags I bought. I knew they would come in handy someday!

But if this goes on, with her back rubbing against my length. I won't be able to hold on much longer!

"Ha…ha…Kazuma…"

Not to mention all these wonderful noises she's making! Calm down Kazuma! Now is not the time to indulge! Make her feel good first!

"Kazuma…"

Before I could react, Megumin stood up, turned around, and sat back down on my lap with her legs around my back.

"O-oi… if you rub your lower half against me like that I won't be able to hold myself back-"

"Kazuma, it's not fair to you if I'm the only one who feels good... so let me do something in return."

Before I could say anything, Megumin wrapped her fingers around my shaft and started pumping up and down slowly.

Her small hands felt so wonderful I swear I could've come right there and then.

"Ah... Megumin… you can go a little faster…"

Hearing my request, Megumin quickened her pace slightly.

"Does it feel good?"

I gave her a quick nod while panting. She smiled slyly and pumped passionately while looking at my length with glowing crimson eyes.

H-holy shit. Although her hand movements are a bit sloppy. Seeing her try so hard to please me is such a turn on!

After a few minutes. I could feel my climax inching closer and closer. I wanted to cum after such a long time, but I didn't resist my urge to masturbate just so I could be finished by a handjob!

"Ha…Megumin stop, I don't want to be finished like this."

As if she understood what I meant. She gently releases her grip on me to let me calm down for a few moments.

"Kazuma is a lot bigger than I thought."

Was that supposed to be a compliment?

I have to thank that excellent doctor if I ever visit again.

"T-thanks... you're a lot better at this than I thought you would be."

"Well those magazines under your bed helped me with understanding what to do."

...

Seeing my face as red as a tomato, Megumin giggled loudly.

"I don't mind them Kazuma. I understand that it's normal for boys to have those things, but now that you have me you won't have to look at those magazines ever again alright?

Stop it. If you talk so boldly like this my heart will actually explode.

"Have you calmed down yet Kazuma? It's rude to keep a lady waiting, you know?"

"Y-yeah, let's move on."

As soon as I said that. Megumin got on her knees. Such a move made my son twitch happily in anticipation.

With me sitting down, she held her Lower body right above my member and slowly started to descend.

For some reason, I felt like something was missing, but I couldn't place my finger on what.

Wait a minute.

Ah!

The potion! I forgot to drink the potion Vanir gave me! Ah crap what do I do?!

"Megumin wait! Can we continue this in my bedroom? I don't want our first time to be in the bath!"

"Ehh?! You're really going to say that now?! After you got me so worked up you want to continue this later rather than now?! You really are good at ruining the mood!"

"No that's not it! I-I have a potion in my room that prevents pregnancy! And I forgot to drink it that's all!

"Shouldn't I be the one who drinks that potion?!"

"No Vanir said the potion is meant to prevent sperm cells from fertilizing the eggs so I should be the one who drinks it!"

Megumin stared at me with an angry face and sighed.

"Fine, let's hurry and dry ourselves off so we can continue this."

Instead of staying angry, Megumin stood up and looked at me with a smug face.

Gulp

- After we dried ourselves off, we put on a towel and hurriedly tiptoed our way into my room.

"Hurry up and drink the potion, I don't want to wait anymore."

I went to my desk to retrieve the potion and drank it.

We sat on the bed in the same position we did in the bath, with me on the bed and her on top of me.

As she sat on me, she pushed her wet and slick lips against my shaft making my son harden more and more.

"Are you ready Kazuma?"

"Y-yeah…"

Without another word. Megumin lifted her body upwards with one hand behind her back, aligning my penis against her entrance with the other, and slowly began to engulf me.

My shaft slowly disappeared from my sights inch by inch. Megumin's insides were extremely tight, so tight that it borderlines pain and pleasure. Thanks to her slickness, I slid in fairly easily.

I could smell a heavy scent of iron, no doubt her hymen is broken.

Megumin panted heavily with a painful look on her face.

"M-Megumin... are you ok? We can stop this if you don't want to continue anymore..."

"It hurts but I-I'm fine… just give me a second so I can get used to it…"

Seeing her in pain makes my heart ache, so I gently leaned forward and kissed her in hopes that it'll distract her from the pain.

"Umph!"

As our kiss went on longer and longer. Megumin began to moan into my mouth.

"I don't feel pain anymore Kazuma… I'll start moving now."

She slowly lifted her body until only the tip remained inside and pushed herself down only to repeat the process.

I gently placed my hands on her thighs and slid them up across her sides to her boobs and gave them a small squeeze.

"A-aahh...Kazuma…"

Hearing her Megumin moan out my name like that sent shivers of delight down my spine.

"Faster...go faster Megumin…"

As I played with her erect nipples, Megumin quickened her pace. The way she bounced up and down without stop sent my nerves into overdrive.

The sound of our pants quickened and increased.

"Don't stop Megumin, you feel incredible..."

"Kazuma feels very good too…"

Over and over again her insides grind against me. Every time she pushed herself down I could feel every curve and bump sliding down from the tip to the base of my shaft.

Sex feels way better than I ever imagined! The way her warm insides spread and tighten around me feels heavenly!

"Kazuma… my belly feels hot… I think I'm close…"

"M-me too Megumin… I'm at my limit too..."

After a few more bounces Megumin leaned forward and embraced me while resting her head on my shoulder. I grabbed her ass with both my hands and started moving her in rhythm to her bounces.

"Kazuma!"

As her entire body tensed up, she slammed herself down and moaned out my name in pure ecstasy.

Hearing Megumin say my name in such a way plus feeling her insides pulsing and tightening even more around me as she had her orgasm. I was also pushed over the edge and came deep inside her.

This was the best orgasm I've ever had in my entire life. Every pulse of my penis shot out massive amounts of cum as her insides were filled to the brim.

I guess this is what happens when you save up huh?

Megumin looked at me with blissful eyes and kissed me passionately while wrapping me in a tight hug.

- After we calmed down a bit, I slowly lifted Megumin. As my son came out, a clear white liquid dripped down from her lips and onto my crotch. Even after such an intense orgasm, my penis twitched slightly from the feeling.

I gently settled Megumin down right next to me and laid on my side.

Hm?

I took a long look at Megumin.

"Oi Megumin, did your hair grow longer?"

"Do you like it?"

"I do. Your hair smells nice as well…"

"Well, I'm glad you like it Kazuma..."

"... Say Megumin… does our relationship still count as 'more than friends but less than lovers'?"

Hearing me ask such a question after all we did, Megumin giggled.

"Hehe… I think what we did tonight is way past that Kazuma."

"Does that mean we're like… officially in a relationship now?"

"I guess yeah."

"Oi, why are you so calm about this?"

"Shhh… don't ruin our afterglow alright?"

As I laid there and closed my eyes, I could feel the fatigue seeping into my body.

So much has happened today, I went to the Demon King's castle. Defeated countless enemies. Had a one-on-one death battle with the Demon King himself. It's a miracle I haven't collapsed yet.

I could feel the need to sleep slowly consume my fatigued body, but before I could fall asleep.

"I love you Kazuma."

"I love you too Megumin…"

I calmly drifted off to sleep.