Issei's been flying with his Pegasus for days to get back to Kouh and he's now at the outskirts of town. His Pegasus started to decent to the ground because of it's exhaustion.

Issei: "It's alright boy, I'll walk back home."

The Pegasus turned into flames and it disappeared. Issei started to walk back home with his new Axe but he covered it with a cloth to not disturbed or scare some people.

Issei finally arrived home and one of his Maids saw him and open the gates for him.

Maid: "Welcome Home, Master."

Issei: "Thank you. Where are the others?"

Maid: "The others are preparing breakfast and Lady Rias and the others are still asleep. Would you like me to carry your things?"

Issei: "No thanks, I got this. Just call me if breakfast is ready."

Maid: "As you wish, Master."

Issei walk inside his Mansion and saw the other Maids were cleaning and they greeted him.

Maids: "Welcome back, Master."

Issei: "Thank you."

He went up the stairs and head to his room. When he got inside, he saw Rias sleeping naked with a body pillow of him hugging between her breast. He leaned the Axe down near the nightstand and sits on the couch.

Issei: *Sigh*"That was one hell of an adventure."

He took off his boots and lay down on the couch to rest for a while. Issei quickly drifted asleep because of lack of sleep for the past few days.

Time Skip

Kiba walk out of his room wearing a light-blue sweatshirt with a hood, a light-blue sweatpants and a pair of black jogging shoes. He went down the stairs and some Maid greeted him.

Maid: "Good Morning Kiba-sama. Breakfast will be ready soon."

Kiba: "Please save me some breakfast later. I'll just go jog around for a bit."

Maid: "I will Kiba-sama, take care."

Kiba walk out of the Mansion and head out of the gate and started to stretch a for a bit before started to run.

Rossweisse walk down to the kitchen while holding her head in pain and the Maid approach her.

Maid: "Rossweisse-sama, do you still have a headache?"

Rossweisse: "Y-Yes..."

Maid: "Please hold, I'll grab some medicine."

Rossweisse: "T-Thank.. y-you..."

The Maid walk out of the kitchen to go get some medicines. Then Tohru put some food on the table and assist Rossweisse.

Tohru: "Come one Rossweisse-sama, let's get you some breakfast before you take your medicine."

Rossweisse: "T-Thank you... T-Tohru..."

Rossweisse sits on the table and eats her breakfast while the Maid went back to the kitchen with the medicine. She finishes her breakfast and about to drink the medicine until she covered her mouth and run to the bathroom.

Tohru and the other Maid follow her to the bathroom. When they arrived, they saw Rossweisse puking on the toilet bowl. Tohru pat her on the back while the other Maid gave her water to drink.

Tohru: "Are you alright Rossweisse-sama?"

Rossweisse: "Y-Yeah, t-that just came out of nowhere..."

Maid(Shock)*Gasp*"Maybe perhaps your... you know... Pregnant?"

The two Maid look at Rossweisse with a shock look. She on the other hand kept her normal expression until her face turned steaming red when she realized what she said.

Rossweisse(Blushing): "W-W-What?! T-That can't be! I-I-I-I haven't d-done it with anyone b-before!"

Tohru put her hand on Rossweisse's stomach. She closed her eyes and her palm began to glow white. When the light died down, she gave a sigh of relief and gave Rossweisse a good news.

Tohru: "I didn't feel any sign of life inside her so she's not pregnant."

Maid: "I see, sorry for giving you a false news Rossweisse -sama."

Rossweisse: "I-It's alright thought..."

Tohru: "But I did felt some alcohol inside of you. Perhaps that's the reason why you feel sick."

Rossweisse: "B-But, I only drink one glass of wine!"

Tohru: "Maybe your a very light drinker. And not used to it."

Rossweisse: "I-I guess so..."

Tohru: "I better head back to the kitchen, the others might be awake by now. Please excuse me."

Tohru left Rossweisse and the Maid by the bathroom and head to the kitchen.

Inside the Master's Bedroom, Rias slowly waking up while cuddling the body pillow. When she opens her eyes, she saw something covered leaning on the nightstand near the bed. She sits-up, uncovers it and saw Axe with some markings on it. She touch the Axe and immediately let go for the coldness.

She then looks around and saw Issei sleeping on the couch. She felt in complete joy when she saw Issei. She grab the blanket and covered it on Issei and she kiss him on the forehead.

Rias(Whisper): "I happy to see you again, my beloved Ise."

She put her clothes back on, carefully closing the door and went to the kitchen. She saw everyone else eating breakfast as well as Sona, Tsubaki and Saji.

Rias: "Good Morning everyone."

ORC(Except Kiba): "Good Morning President."

Kuroka: "Hey Rias, Morning."

Sona: "Good Morning Rias.

Tsubaki: "Good morning as well Lady Rias."

Saji: "Good morning President Rias."

Maids: "Rias-sama. Good Morning."

Rias: "Where's Kiba?"

Maid: "Kiba-sama went jogging few minutes ago."

Rias: "I see. Everyone, I have some Good News. Ise is back home!"

Everyone is shock in surprise that Issei is back.

Koneko: "Onii-chan's back?!"

Asia: "Issei-san is back? I'm so glad."

Sona: "Where is he now?"

Rias: "He's asleep right now at our room. He's probably exhausted from his journey."

Maid: "Excuse me Rias-sama, but Master has requested to wake him up if breakfast is ready."

Rias: "I will do it. Everyone, please continue your food. I'll wake Ise up."

Everyone continue eating their food while Rias went back to the room to wake Issei up. She opened the door and whispered onto Issei's ear.

Rias(Whisper): "Ise, time to wake up. Breakfast is Ready.~"

Issei slowly open his eyes and felt a touch on his cheeks. He fully opens his eyes and saw Rias with her usual sweet smile looking at him.

Rias: "Good Morning Ise.~"

Issei: "Oh, hey."

Issei slowly sits-up on the couch while he stretch his arms out and heard a satisfying crack.

Rias: "When did you got back? And why didn't you lay down next to me?

Issei: "I just got back this morning and you already have a body pillow of me laying down next to you."

Rias: "It's because I was so lonely when you weren't here with me. So I made a body pillow of you."

Issei: "Well you do have a fetish with me. Anyway let's get some breakfast, I haven't eaten in days and I'm going to the underworld later."

Rias: "Why?"

Issei: "I need to show that to Beelzebub, he might know something about that magic."

He pointed at the Axe leaning on the nightstand.

Rias: "Where did you found it? It felt so cold. it's even colder than Grayfia-oneesama's magic."

Issei: "I'll tell you the details later, right now let's go downstairs."

The two of them headed downstairs to the kitchen and everyone else greeted Issei a welcome back

Time Skip

Rias created a magic circle on the flood and Issei and her teleport to Sirzechs office in the Underworld.

Sirzechs is doing some paperwork while Grayfia is serving him some tea when he saw his family's magic circle appeares on the floor then Issei and Rias come out of it.

Sirzechs: "Rias, Issei it's good to see the two of you again."

Grayfia: "Welcome back Rias-sama, Issei-sama."

Rias: "Hello again Onii-sama, Grayfia-oneesama.

Issei: "Hello Sirzechs, Grayfia, how are you guys doing here?"

Sirzechs: "Where doing fine Issei, besides doing these pile of papers, we're still doing fine."

Issei: "I see..."

Sirzechs: "So what brings you here my future brother-in-law?"

Issei: "I need to talk to Beelzebub with something."

Sirzechs: "This must be interesting, mind if we come?"

Issei: "Very well, let's go."

Sirzechs created a magic circle on the floor and all four of them teleports to Beelzebub's laboratory. When they got there, they saw Beelzebub sitting on the chair with his feet up the table and he was playing with his phone and he didn't know that they were behind him.

Beelzebub (Playing): "Alright only five of us left. I'll just have to ambush them at the safe zone."

Issei, Rias, Sirzechs and Grayfia look at each other then went back looking at Beelzebub with a sweat drop.

Beelzebub (Playing): "There's a supply, better get it before-"

He didn't finish his sentence when someone shoot his character and caused him to lose the game. He stands up immediately screamed on the top of his lungs.

Beelzebub: "NOOOOOOO!!!! DAMN IT!!! I WAS SO CLOSE FOR GETTING THAT CHICKEN DINNER!!"

Issei: ""

Rias: ""

Sirzechs: ""

Grayfia: ""

Sirzechs cought a little to gain Beelzebub's attention. He stop gripping on his phone and slowly turn his head around. He then saw the others watching him act like a child.

Beelzebub: "H-H-How long h-have you been standing there?"

Grayfia: "Before you plan to ambush the remaining enemies."

Beelzebub blushed in embarrassment and quickly turn his head forward and compose himself.

Beelzebub: "S-So, what are you all doing here?"

Sirzechs: "Actually, Issei wants to talk to you about something."

Beelzebub: "Lord Issei? What can I help you with?"

Issei: "Can you examine this for me."

Issei held out his hand and the Axe fly towards his hand. Everyone was shock when they saw the Axe came out of nowhere.

Beelzebub: "Where did you found it?"

Issei: "At the abandon temple on the north of the Human world."

Issei held the Axe to Beelzebub and he grab it with both of his hands. When Issei let's it go, the Axe immediately drop to the ground along with Beelzebub's hand. He tried to lift it or at least drag it but it was no avail.

Beelzebub: "It's too heavy!"

Sirzechs tried to help him carry the Axe but still no avail.

Sirzechs: "It didn't even move an inch."

Beelzebub: "I apologize Lord Issei but, can you please carry it to the scanner over there?"

Issei grab the Axe by one hand and place it on Beelzebub's scanner. Beelzebub started scanning the Axe and it show that's it's made from an unknown magic.

Sirzechs: "Well, how was it?"

Beelzebub: "This is weird, it say's here that it's an unknown source. And I've never seen this kind of magic before."

Issei: "Is Ice the only magic the Axe have?"

Beelzebub: "It seems like it. Can you please cover the Axe with Ice?"

Issei walk to the scanner, grab the Axe's handle and cover the entire head of the Axe with it's Ice.

Beelzebub: "Now Grayfia, please create an Ice of your own magic so I can compare it with the Axe."

Grayfia created a small Ice statue of Millicas on her hand.

Beelzebub: "Good, please hold for a few seconds."

The two scanner scan Issei's Axe and Grayfia's Ice statue. After a few seconds, the computer beep and it show the result to Beelzebub."

Sirzechs: "What did it say?"

Beelzebub(Shock): "Incredible! The Axe is even colder that your wife's personality-... I mean Power! he he..."

Grayfia somehow grew a tick mark and crashed the statue on her hands. Sirzechs and Rias were trying to keep Grayfia from stabbing Beelzebub while he keep observing the Axe.

Beelzebub: "these markings on the Axe... they looked very familiar... but I can't my finger on it."

Issei: "Those markings glow whenever I use the Axe's magic."

Beelzebub: "I see. May I please take a photo of the Axe's Markings to research them?"

Issei: "Go ahead."

Beelzebub took some several photo of the Axe from all different angle.

Beelzebub: "Thank you Lord Issei, I'll call you when I found something about it."

Issei: "Alright then. We'll be going now. Rias, let's go home."

Rias: "Alright. We're going now, Onii-sama, Grayfia-oneesama, Beelzebub-sama."

Sirzechs: "Farewell Rias, Issei. Please do visit again."

Grayfia: "Good-bye Rias-sama, Issei-sama. Do take care."

Rias makes a magic circle and teleport the two of them back to the mansion while Beelzebub and Sirzechs still talks about something.

Issei and Rias arrived at the mansion's living room where they the ORC along with Sona, Tsubaki and Saji are studying with Rossweisse teaching them.

Sona: "Hello Rias, where did you two go?"

Rias: "We were at the Underworld, Issei wanted to talk to Beelzeub-sama about the Axe he found."

Tsubaki: "What Axe?"

Issei: "This Axe."

He uncovered his Axe and show it to everyone and they all looked amazed.

Saji: "Whoa! That looks so cool! Where did you found it?!"

Issei: "In an abandon ancient temple on the north."

Saji: "May I?"

Rias and Issei looked at each other before giving Saji a shot.

Issei: "Alright."

Saji held out his hands in excitement and Issei place the handle on his palm and slowly let it go until the Axe hit's the ground, crashing Saji's hand.

Saji: "AAAAAAAHHHHHHH!!!!!"

Saji gave a painful shriek and Issei quickly pick up the Axe while Saji jumping around with his broken fingers.

Issei: "Asia, please heal his hands."

Asia: "H-Hai."

Asia started to heal Saji's hand while the others just observe the Axe.

Kuroka: "That is some Axe."

Akeno touches the Axe's head but immediately let go.

Akeno: "It's so cold."

Xenovia: "Can cut through anything?"

Issei: "Not sure. I haven't try that before."

Kiba: "What's with does markings? Never seen anything like it."

Issei: "I neither. But Beelzebub will call if he found out anything about it."

Rossweisse: "Alright everyone let's go back to studying. You all have an upcoming test this week."

Everyone went back to the couch to continue their studying. Issei was about to go upstairs but portal appeared in front of him, stopping him from his tracks.

???: "Master!~"

He heard a familiar voice calling him while everyone look at the portal with a black figure slowly walking out of it.

???: "Master!~ Why haven't you call me?!~"

The figure finally walk out of the Portal and they saw Issei's Familiar Trihexa.

Trihexa: "Master!~"

She run towards Issei and push him on the ground while embracing him.

Issei: "Oh he Trihexa, I almost forgot about you. How you've been?"

Trihexa: "I've been so lonely for the past few weeks without you Master.~"

Issei: Oh, sorry about that. I've been busy for the past few weeks I almost forgot about you."

Trihexa: "Master your so mean.~"

Issei: "U-Uh, sorry. How can I make it up to you?"

Trihexa: Well~ There's one way you could make it up to me.~"

Issei: "What is it?"

Trihexa: "This week happens to be Dragon's mating season.~ And then we'll be even.~"

The others were just staring at them whit a shock faces.

Everyone(Except Asia): "EEEEHHHHH?!"

Asia: "Um, what's a Dragon's Mating Season?"

Kuroka: "Oh Asia dear, you are so pure. A Dragon's Mating Season is..."

She whispered the rest of the detail on Asia's ear and she immediately blushed madly.

Kuroka: "Do you understand now Asia dear?~"

Asia(Blushing): "H-H-Hai..."

Trihexa: "Well,~ Come on now Master.~ And let's get started.~"

She dragged Issei and headed upstairs while everyone else watch.

Kiba: "Um President? Your not going to stop her?"

Rias: *Sigh*"As much as I want too, she's on her mating season. If she doesn't do this, she might go crazy and destroy everything around her."

Sona: "She's right. Dragons are extremely aggressive when it comes to mating season. Let's just leave them be and get back to studying."

Everyone: "Hai."

Xenovia: "Where's Rossweisse?"

They all look around and saw her sobbing at the corner.

Rossweisse(Sobbing): "Why can't I find someone for me?!"

The others helps Rossweisse with her sobbing problem while the others went back to studying.

Upstairs on the Master's Bedroom, Trihexa tossed Issei to the bed and lock the door and cast a soundproof barrier around the room. She slowly crawl towards Issei with a lust expression.

Trihexa(Lust): "So, Master.~ Shall we start with our fun?~

Issei: "S-Sure, you can take the lead."

Trihexa(Lust): *Giggle*"I knew you would say that.~"

LEMON WARNING

She put both of her hands on Issei's cheek and start to kiss him passionately with her tongue slowly insert his mouth. She then put one of her hand on Issei's manhood and massaging it.

She took off her dress until the waist, revealing her breast with the same size of Rias. Issei placed his hand on her breast and start stroking it.

Trihexa(Lust): "It's not fair that I'm the one who's getting naked.~ Take off your clothes too Master.~"

Issei took his shirt off and Issei unbutton his pants and took it off leaving his boxers on. Issei starts sucking on her breast while she starts fingering her womanhood.

Trihexa(Moan): "Ahh~ Yes Master!~ Your so good with your mouth!~"

She then lay Issei's back on the bed and she crawl down to his boxers.

Trihexa(Lust): "Now then, it's my turn to pleasure you, Master.~"

She pulled down Issei's boxers and start to stroke his manhood with her hand until it was fully erect. She started to lick the head while fingering her own womanhood with her free hand. She then slowly suck the head all the way down to the half.

Issei: "T-Trihexa, if you keep going faster, I'm going to..."

Trihexa(Muffled): "Go ahead Master, release it in my mouth.~"

Issei released his load inside her mouth and she swallowed every last drop.

Trihexa(Lust): "Yum~ that was the best yogurt I've ever tasted.~"

She took off her panties and mounting Issei by the waist.

Trihexa(Lust): "Master~ I can't take it anymore.~ Please, I need you right here and now.~"

She slowly insert Issei's manhood inside of her while wincing in pain. When Issei's manhood fully went inside her, some blood were leaking out of her and Issei noticed it.

Issei: "Your still a virgin?"

Trihexa: "Y-Yes, I've been saving myself for the special someone I loved, and it happens to be you, Master.~"

She started to move up and down slowly while getting used to the pain. She then lay her chest into Issei's she used her hip to move.

Issei then used both of his hands and groped her butt cheek.

Trihexa(Lust): "Master please~ I've been a very bad girl~ Please punished me!~"

He slap her butt cheek and her womanhood became very tight.

Issei: "What were you doing for the past dragon mating if this is your first time?"

Trihexa(Lust): "I-I've been on a rampage to suppressed my instinct.~"

He slap her butt again and making her moan with her eyes looking up and her tongue stinking out.

Trihexa(Lust): "Yes Master!~ Punished me!~ I've been a bad little Dragon!~"

She keep moving faster and faster until the two of them felt their climax coming.

Issei: "Trihexa, where do you want it to?"

Trihexa(Lust): "Inside Master!~ I want to have it burst inside of me!~"

Issei release his load inside of her womanhood and she has a very satisfying face of bliss.

LEMON END

Time Skip

After mating with Trihexa, she was very exhausted and Issei let her sleep in his room. He went to the living room and saw everyone is just watching TV and some were just reading a book.

Issei: "Looks like all of you guys are finished with studying."

Rias: "Hello Issei, how's Trihexa?"

Issei: "She's fine now. She's just sleeping upstairs."

Then Rias received a call from her Magic Circle. She cast a magic Circle on the table and a holographic of Beelzebub appeared.

Beelzebub: "Hello Rias, is Lord Issei with you?"

Issei: "Yeah I'm here."

Beelzebub: "Lord Issei, about those markings on the Axe."

Issei: "What about it?"

Beelzebub: "I found out that those markings are from the Norse. It's not from Asgard but I know it's from the Norse."

Issei: "I see, is there anything else?"

Beelzebub: "Maybe perhaps we could ask Lord Odin about the Axe. Or any of the Asgard if they know."

Issei: "I think I know someone. Thank you for your help Beelzebub."

Beelzebub: "My pleasure, Lord Issei."

The hologram and the Magic Circle disappeared and Issei summons his Axe.

Issei: "Rossweisse, can you please help me with something?"

Rossweisse: "Sure, what is it Issei?"

Issei: "Does these markings familiar to you?"

She take a very close look at the markings and she was shock when she realized what it was.

Rossweisse*Gasp*"I only thought it was only a legend!"

Rias: "What is it?"

Issei: "Beelzebub said it was from Norse."

Rossweisse: "It true, but it's an ancient Norse from thousands of years ago."

Issei: "Do you know what the marking means?"

Rossweisse: "Yes, those marking are called 'Runes'. They're the source of the Axe's power. Runes in this time is no longer exist. Even Lord Odin would don't know how to make Runes."

Issei: "How about this symbol at the pommel? Do you know it?"

She look at the symbol at the pommel of the Axe and saw a very familiar symbol.

Rossweisse: "Please wait here, I'll go get something."

She ran upstairs to her room to get something.

Rias: "So this Axe has been existed for thousands of years?"

Issei: "Guess so. But it still looks very brand new."

Rossweisse ran back to the living room and she was holding a very old book covered in leather. She open the book and search every page for the meaning of the symbol.

Rossweisse: "Here it is. It's the brand of the Huldra Brothers."

Xenovia: "Who are they?"

Rosseisse "They're the most famous dwarfs in all the nine realms thousands of years ago, until now."

Kiba: "How?"

Rossweisse: "All the weapons they created were legendary, They were the one's who crafted Thor's hammer Mjolnir."

Everyone except for Issei were shocked.

Saji: "They made Thor's hammer?!"

Rossweisse: "Yes so was this one as well. Legends say's that the last weapon they created is even powerful than Mjolnir. I didn't know what kind of weapon that they made."

Issei: "Maybe this was it."

Rias: "How can you tell?"

Issei: "When I grab Mjolnir, I saw the same symbol at the pommel. But that symbol can barely see at all. And the symbol on this Axe, can be see as bright as day."

Rossweisse: "Then this is the Legendary weapon of the Huldra Brothers. I wonder what would Lord Odin do if he found out about this."

Issei: "He will do nothing, if he wants to prevent Ragnarok."

Kuroka: "So does that Axe have a name?"

Rossweisse: "Sorry, I have no idea about the Axe's name either."

Issei: "I'll just have to ask my Father if he knows something about this. Right now, you guys can do whatever you want."