(Hodr in Norse mythology is the god that shot the Mistletoe arrow at Baldur and killed him. He was then killed by Vali, a son of Odin and a Giant. He doesn't exist in DxD, but his Myth does, so that is why Vali got adopted by Odin in the Light Novel.)
After Jack's first explosive day in Asgard, his following days continued in that pattern. In Asgard, there was no shortage of challengers and Baldur his new self-proclaimed best friend was always looking for another brawl.
Jack never refused, but fighting was not all that the Aesir did. Now that he was in Asgard, all Odin wanted was the chance to study Brynhildr. He didn't mind that as the daughter of Odin did sacrifice herself to seal away Ahramina.
While Odin got to study the sword to give him more of its secrets, Kalawarna and Raynare did not have a good time. Freya was a ruthless teacher and she forced the two Fallen Angels to practice magic until they were on the brink of passing out.
Then, they were forced to undergo the grueling training program of the Valkyries who trained for war. Since most of the Valkyries were Demigods, they had a physical advantage which left the two Fallen Angels exhausted.
Their saving grace was their nightly duty to satisfy Jack's ever-growing lust. The constant infusion of Jack's essence into their bodies meant that they could recover and even improve after their training program.
For the first time in centuries, they actually began to grow stronger, and by the end of the month they both through constant grueling training and constantly absorbing Jack's essence, finally made it to the next level.
They gained their second pair of wings, and for a little while they felt proud of that, but it got crushed down just as fast. Rather than make their training easier, it just made it more demanding as Freya used enchantments to weigh them down and seal away their magic.
Amara was even roped in by the Valkyries as they used her Gravity Jail Sacred Gear to increase Gravity to make their training harder. Amara could increase Gravity up to 100 times, but the constant use of it allowed her to push higher.
That just made the hell of Kalawarna and Raynare harder as not only were they weighed down by Freya's spells, but the cat crushed them with gravity. As such, they could only rely on pure grit while they were put to grueling training regiments.
Just holding a sword was hard when it weighed several tons under the effect of Amara's Gravity Jail. The intensive training made them feel like their muscle fibers were tearing and their bones were grinding into dust.
After all that, they then had to complete their magic training under Freya and the rest of the Valkyries. The Valkyries though didn't mock them for being weak, as they had all undergone the same treatment.
Kalawarna and Raynare had begun to wish that their nights came faster as only that seemed to relieve their agonized broken bodies. As a result of trusting him more, their Master-Servant Pacts began progressing.
That increased their power slightly, but it made it easier for them to grow stronger. Once again, it just increased their training regiment to even more ridiculous levels. If not for the fact that it worked, they would have preferred to just be Jack's Sex Slaves.
What Freya said about them was that the reason they had not improved was that they were just lazy. She was forcing them to improve it was working. While they were being pushed harder than ever, Jack began to spend more time with the sons of Odin including Thor, Baldur, Vidar, Tyr, Heimdall, Hermod, and Hodr the twin of Baldur.
Odin had a lot of sons, but he had only one daughter, Brynhildr. Even among his travels in the old days when he sired many Demigods, he kept track of things through his Ravens, but he only ever sired sons. In his early days, Odin felt that was better as his Demigod children were mighty pillagers, reavers, warriors, and leaders.
However, eventually, Brynhildr was born which is why it broke him to lose her. He was just glad she was safe. When Jack's month at Asgard came to an end, his new friends wished him well as he returned home.
He had improved greatly as he had used his Balance Breaker and refined it every day in his battles with the Sons of Odin. He even began to use Brynhildr and as his power increased, so did awareness begin to return to the souls in his blade.
By the end of the month, not only had he improved his handle on his Balance Breaker, and improved his sword skills. Freya, when she was not busy had tutored him in Norse Magic.
Just as she did for the Valkyries and the Sworn Brother of Odin, Loki. When the time came for him to leave Asgard, he was told to return anytime he wanted. He wasn't the only one who improved as through their torturous training regiment, Kalawarna, and Raynare managed to gain their third pair of wings.
Part of that came from Jack constantly infusing them with his semen which surged his highly potent energies into their wombs. The brutal training regiment just served to turn that into power resulting in them not being so pathetic.
After leaving and returning home he was instantly interrogated as Raynare and Kalawarna had moved in with him. They had to because otherwise, he would have to deal with his desires by himself.
Now that they had been humbled, they were far more pleasant to talk to than before. His Mother and Father didn't push him much as they knew that teenagers were hormonal and Jack was even more so because of his many Draconic Organs.
They let it go as he was basically independent from them, but Aya and Moka didn't. Sacred Gears had a funny effect on their owners, and Variant Detonation made Aya explosive. As for Moka, Outer Moka didn't mind it as much as she was much sweeter and didn't really get what was wrong.
During that time, she had been drinking regular human blood so Inner Moka had been asleep the whole time. When he finally gave her another dose of his blood and she woke back up, she instantly tried to kick him.
They may have worked on anyone else, but Amara simply crushed her with gravity. Amara was really starting to like her Sacred Gear, but Moka pushed past that and jumped at him to kick his face.
Instead, he caught her leg and spun her around like a merry-go-round to the point she was begging him to stop. It was funny that he made the prideful and arrogant Moka beg him to stop spinning her.
He made her apologize and promise to not kick him which she instantly did to avoid puking. When he let her go, she glared at him which he just found adorable. They were similar in that they were arrogant as Vampires and Dragons had similar personalities.
Wrathful, Prideful, Slothful, Greedy, Lustful, sometimes Envious and Glutonous. Just that dragons often took it to the extreme so the arrogance of a Vampire wouldn't work on a Dragon.
When Inner Moka went to sleep, she swore to get back at him, but he didn't detect any real hostility. It was mostly just a child-like grudge she would get over. He did have to deal with Aya who gave him the cold shoulder.
His Father just wished him luck, while Azazel gave him advice on how to manage the attitudes of a harem. It was helpful so Jack took his advice to heart and he just made sure to remind Aya that he wasn't going to forget her.
As for Inner Moka when he did wake her up, she either forced him to spar against her or just ignored the situation. Then again, she was 11 and she was still a child. While he was the same age, he just had the blessing of fusing with his Other self.
It was just something he had to work on in the future which was exactly what he did. After leaving Asgard, his Mother took him to the hidden Dimension of Oz which was hidden away in the Dimensional Gap.
Oz was a much more mystical place which he barely knew anything about. All he knew were the main four countries the Munchkin Country, Gillikan Country, Winki Country, and the Quadling Country.
When he entered Oz, his Mother took him to the Capital The Emerald City where she had grown up. There, he met his grandmother, Alessia one of the former students of the Locasta the Good Witch Of The North.
After the passing of her teacher, she hadn't taken up the title since she like her daughters' had delved into the dark corners of Magic. He also met the younger sister of his Mother, Krimhild. Unlike her Mother and sister who had more Italian names, she had taken the name of Krimhild by herself.
Her birth name had been Cecilia, but she changed it since she was a big fan of the legend of Krimhild the wife of Siegfried. His grandmother and aunt much like they had done for his sister were swooning all over him.
As the first male born in their family in generations, they wanted to know more about him. He didn't mind meeting more of his family and his grandmother and aunt were doting. His grandmother even helped him with his magics which much like his Mother were powerful and dark.
As for his paternal side, he did meet his Father's sister, Amelia who was only 15. She was the only one on his paternal side who didn't hate his Father. Unlike her and Jack's Older Brother Jason, she was talented.
Oceanus who had refused to bless Jason, had given her his blessing instead. From what Amelia said, Jason was more bitter than ever. The parents of Jack Sr were also quite ashamed he could just wander in when he wanted without consequence.
He did it on purpose to spite his old, bitter parents and older brother. Jack didn't bother with those people as he had enough family with his maternal side and his dad's sister.
He was always busy and he decided to go back to Asgard quite frequently to party with his friends. To make the most of the situation, he brought Basara, Vali, Aya, and Moka with him who were welcomed with open arms.
Sometimes, even Akeno came along since she needed new friends. Vali and Basara got dragged into the fighting and partying with the sons of Odin, while Aya and Moka got pulled into the Valkyrie training with Raynare and Kalawarna.
Outer Moka struggled as most of her power was sealed, but that just made Freya push her harder. As they were younger, they received regular healing while Kalawarna and Raynare got the best elixir they could get from Jack.
As a result of their training regiment with the Valkyries, they met the youngest initiate into the Valkyries, Rossweise. She was a year older than Akeno and Vali while being a year younger than Jack.
Since she was around their age, she quickly got roped into their group as she became friends with Aya and Moka. Through that friendship, she was introduced to Jack who knew her quite well.
Another one of Other Jack's girlfriends and quite a funny girl. She was self-conscious when Other Jack met her since she and her Valkyrie sisters hated being single. Not to try to manipulate her, but since she was his age he didn't mind getting closer to her.
In this manner, he spent the next four years moving around either in Oz with his maternal side, exploring the Nine Realms of the Norse with his new sworn brothers, training in Grigori, sword fighting with his dad, Jin, or anyone else willing to fight.
While Azazel didn't recommend this, Jack also began to speak to Satanael. He didn't let the Fallen experiment on him, but he did have sort of a partnership with the mad Fallen to work on Artificial Sacred Gears together.
He did that to keep an eye on him which caused Satanael to stick around longer in Grigori than he should have. The assassination that took Shuri in Other Jack's world didn't happen so Akeno got to grow up with her Mother.
Since he also spent time over at Baraqiel's house to keep an eye on Shuri, Akeno stuck around him more. He told her all about his adventures and since he dragged Basara and Vali into his adventures things were never boring.
Then meeting each other caused the two younger boys to become rivals as they had opposing Dragons. Apophis merely watched on from the side as she considered the squabble of Ddraig and Albion beneath her.
Akeno even pulled herself along and she asked her Father and Mother to train her to grow stronger. That caused her to quickly begin growing her wings since she had the bloodline for it already.
The next four years of constant adventure pushed them all into powerful youths. As a result, Basara undid the biological seals on his Devil powers resulting in him growing a pair of greenhorns like his Mother.
He also gained his Mother's Gravity Magic and Demonic Power which increased his already powerful abillities up several levels. He even grew a large set of wings that seemed like a mix of Devil and Dragon. That caused Vali to push himself harder to keep up and not be left behind. As the two Dragon Emperors used each other as stepping stones, the real powerhouse Jack watched from the side.
He stopped switching out more of his organs with dragon ones as he didn't need them anymore. The more he pushed himself the more his many bloodlines fused and he eventually under the tutelage of Apophis gained his dragon form.
Unlike her who was a serpentine Dragon, he was a Western Dragon with four pairs of gigantic wings. So many things had happened, and now that Jack was 15 and he finished Junior high with Moka, and Aya it was time for him to go to High School.
However, they were not the only ones going as Odin decided to send Rossweisse with them since she was old enough to go to High School with Jack. Since it was obvious, the young Valkyrie had a crush on him he sent her with them.
He also considered it a good exchange program with the Japanese Yokai or Monsters. A mortal High School wouldn't be worth it, so Azazel got in contact with Tenmei Mikogami the Dark Lord and Head Master of Yokai Academy. Tenmei agreed to enroll the four of them since they were close to Moka, and because of Jack, she had become so much stronger.
As for Akeno and Vali, since they were two years younger than the three of them, they had to finish their last two years in Junior High before going to High School. As for Basara, he barely turned 10 so he wasn't even in Junior High.
---
Four years after the first day that Jack entered Asgard he was snoring away in a large King sized bed. He had moved out of his parent's home, but he hadn't gone anywhere. Azazel just bought out the houses in front of him and built a large mansion for Jack.
The naked bodies of Kalawarna and Raynare were pressed against him, and visibly, he was far larger. With four years passing by, he now towered over his two sexy servants and he was now standing at a staggering 6'10. All over his body as a result of his Norse sworn Brothers, he had several Norse tattoos and runes on his body.
(Images here)
Every once in a while, shimmering dark veins glowed across his body as his internal energies flowed through him. When he opened his eyes, they were as they usually were, black sclera, dark blue draconic eyes.
He yawned as he woke up. He reached out and grabbed the tits of his two Fallen Angel babes who moaned at his touch. When they opened their eyes they looked up at him with desire.
Kalawarna pressed herself up against him with a small smile.
"Master, do you want to take us now? I can suck your dick if you want."
Raynare shook her head as she had come to love the touch of her Master. She was as strong as she was now because of it.
"You can fuck my ass instead, won't that feel better? My small tight asshole."
He sat up and yawned as he stretched his body out. He had been fucking these two every day for the last four years and he was in no way getting bored. The more wings they grew, the stronger their bodies and the more beautiful they got.
Especially as their Master-Servant Pacts with the Succubus Nature made them more sexy.
"Of course. Kalawarna, start riding my dick. I will use your cunt juice as lube."
She smiled as she did as he said and she began to finger herself. It didn't take much to get her wet. One thing they loved about Jack was that he just never tired. Plus, he was huge everywhere.
This was how Jack's mornings, showers, and nights went. Enveloped in the sexy bodies of his Fallen Angel sexual servants. Plus, he also considered them good company even outside of sex. Aya and Moka had stopped being jealous of them thankfully as well.
Moka for one had a dad who had two wives, while Aya as she got older simply learned being the only woman in his life was impossible for her health. Akeno and Rossweisse from the start didn't mind in the first place so most of his problems were dealt with.
He would just have to Yokai Academi in a month so he would get ready for that by visiting his friends.