Disclaimer:

I solemnly swear that the literature and works of the Harry Potter Verse belong to JK Rowling, Bloomberg and Warner Bros. The only thing I own are the one-shot ideas that popped into my head and whatever OCs I would create for them. This is a work of pure fiction made solely for fun, constructive reviews will be welcomed, flames will be ignored. Any references to characters in real-life or fiction are purely coincidental. If I could make money out of my ideas, it would be nice...

Mischief Managed Damn It!

Title: Untitled HP x Highschool DxD(No actual title for now)

Posted Date: May 15 2024

Tags: Manipulative Dumbledore, Japanese Superiority over British Magic, Platonic Serafall x Harry, Timeline in the 2000s, Technomancy, slight OOC Serafall

Possible Challenges: Harry x Small Multi, Bad Weasley / Granger, No girls from Wizarding World, No Issei, No Saji, Split Raynare / Yuma situation

A bright flash of pink light erupted within the front garden of the Potter family's cottage in Godric's Hollow, with it breaking apart into balls of light that revealed the presence of a beautiful young girl who appeared to be in her late teens with black hair tied into twin tails, healthy complexion and blue eyes that looked about the property in curiosity. She was quite short in height but appeared to be blessed with generous curves and in particular, her chest instead. She was also, rather unusually, dressed in a pink costume that made one think of those characters from a magical girl show, but one appeared to be aimed for younger adults with how scandalously short the skirt was to show off her healthy pantyhosed legs and how her shirt was lifted by her assets to show her belly button a little.

The light show ended, leaving the woman to look at what may have once been a nice home to live by in the countryside only to have someone attack it with a bomb that blew off the roof. Her nose twitched at the scent of ash, blood and foul magic that permeated the air. Clearly something had happened to warrant her arrival, and she could only hope the person who called her was still alive.

"This is not good." Serafall Leviathan frowned as she made her way inside the house to find the corridor and the living room wrecked like a hurricane had hit it. Based on the spell blasts and half-transfigured furniture with animal features, a magical fight to the death occurred here. Serafall walked out of the living room and made her way to the staircase where she paused to see a young man laid on the floor with his arm mangled, a trail of blood coming from the corner of his mouth and glassy eyes that stared blankly back at her. Based on the wand next to him, he was fighting off whoever attacked the house only to lose their arm and then get taken out.

Serafall startled at the sounds of a child crying upstairs, and after a quick reach to close the man's eyelids, she ran up the stairs to find what used to be a nursery blown up, with the moonlight spreading over a baby crib with said baby brawling its eyes out and the mother laid on the floor next to it, and a small pile of dark robes near her. "Oh no." Serafall stepped around the robes and came forward to comfort the child, seeing that it was a young boy with a bleeding scar on his forehead in the form of a lightning bolt. The boy had apparently sensed her presence and stopped crying to look at her with a sniffle. Serafall slowly reached to hold the baby in her arms, taking care to not agitate the wound on his head. She did frown from the scent of foul magic that originated from the wound, the corrupted energy making her senses go on alert. With a flick of her finger, the wound was cleaned of the blood, but some of the foul magic was still there and it seemed that it wanted to bleed again. Another flick of the finger had the foul magic contained behind multiple seals, taking care to remove any possible connections to the child's soul to avoid contaminants.

A groan drew her attention to the young woman who tried to move only to fail with that attempt. Serafall came closer to the woman, now seeing the contract paper clenched tightly in her hand, and then with a gentle push, helped the woman on her side to look at her and the baby. The young woman took a deep breath at the sudden contact but relaxed upon seeing her and her baby. "You came."

"You did call for me, Lily Evans. Wait, you are now married, so it should be Lady Potter." Serafall gave a sad smile as she looked at the woman's injuries and felt out with her senses. Physically speaking, she had bruises and a couple of broken bones, nothing that some spells, potions and a good night's rest won't fix. But spiritually speaking, she was a mess. Her soul was already removed from her body and the only reason it had yet to fully depart was due Lily calling upon the contract she had made with Serafall, the power keeping her anchored for the short while. "Why did you not call for me earlier? I could have helped you." The redhead let out a pained sigh while the baby tried to reach for his mother, desperate for comfort.

"I wanted to call you several times, but I was not alone for too long, and the people around me are not that understanding of those outside of the wizarding world." Lily took a slow breath to handle the pain. "Dumbledore was also being too nosy around us for the past few months, I could not risk you getting seen and hurt." Serafall frowned at the mention of the old wizard, a man who was quite hypocritical with his words and actions in her opinion.

"What happened?"

"We were betrayed." Lily hissed both in pain and anger. "We were supposed to be hidden under the Fidelius, no one would know where we are unless told by the Secret Keeper. You may be able to get through eventually if you spend time, but we would know about it." Serafall hummed at that bit.

"Then he came without warning a few minutes earlier. James tried to slow him down while I was trying to escape with Harry, but something with the wards had stopped the portkeys from working, and I could not get a message out to the others. I barely remembered the contract ticket when he arrived to take down Harry." Lily coughed painfully, and Serafall could tell she did not have long for the world.

"Hang on, let me get you some help." Serafall moved only for Lily to shake her head.

"I have managed to get the shield up for Harry, and it worked… with a price." Lily was losing her focus but kept on speaking. "It needed a life for a life. Only with my soul, can it be strong enough to defend against his attack." Lily paused for a while and Serafall admittedly thought she had expired before she started talking. "I am sorry I can't continue our talks, I do miss them."

"We can continue having them, we just need to get you to safety." Serafall tried to get her up only to hiss as her hand brushed briefly against the woman's skin only to recoil from the supercharged state of her magic.

"I told you, a life for a life." Luly gave a wan smile. "This may be the type of things that devils may like or hate." Serfall gave a pout at that, making Lily giggle softly before she started coughing again. "Is Harry safe?"

"He is fine, Lily." Serafall looked at the child in her arms. "So this young one is your son Harry." The mention of her son seemed to give Lily a bit more strength to look up and see the baby reaching for her. With an effort that must be monumental for the failing woman, Lily reached out to him, the distance shortened thanks to Serafall moving Harry towards her.

"My son, it is fine. You are safe." Fresh tears went down her face as she talked to Harry. "Mummy is going to take a long nap. I need you to be strong, baby." Harry didn't quite understand what she was saying, but he instinctively knew something was wrong and started to tear up. "Don't cry, Harry. I will continue watching over you, I just won't be physically there." Lily sobbed at that bit, and Serafall had to steady her grip and hold back her emotions, knowing she needed to be strong for the both of them for this moment. Lily then looked at the younger looking woman. "Sera, It may not be part of the deal, but I need to ask for your help."

"The contract we made was for me to be your friend when you need my help." Serafall smiled to ease her worries. "This still counts." Lily took a deep breath at that, her shudders getting a little worse from it. Serafall placed a hand on her hand holding the contract paper, ignoring the light smell of burnt flesh as she focused her magic to it, granting Lily a bit more life force and time to speak. That did the trick and Lily looked better enough to speak stronger.

"Serafall Leviathan, my request is for you to take my son away from this country and raise him like he is yours. I had a vision a month ago. There are people conspiring to control my son over a prophecy that I have doubts on, and there are those who seek to tear down the Potters and my blood family for their lust for gold and power." Lily took another breath. "As far as I know, no one else knows of our contract, and I would prefer to keep it that way to protect Harry."

"Are you sure you want me to take in Harry? Are there no other people to do that?" Serafall asked in understandable confusion, from what she knew of the wizarding world, a lot of people were related to another at some weird degree of separation.

"My vision has shown me that the initial precautions we have taken would not be as effective as those same people would prevent those we have named as potential guardians, and they would move him to my sister against my stated wishes." Lily grunted as the pains started returning. Serfall debated on adding more magic to give her time, but the contract was showing signs of burning out. "Dumbledore… he would claim Harry's guardianship and would leave him to be harmed while he tries to take everything from him through his proxies."

"Do you want me to eliminate him?" Serafall asked with a determined expression.

"I would like that, but I have seen the consequences. Dumbledore will not go down easily." Lily took another breath to steady herself. "The dark wizard who attacked us, he is not dead yet. I do not know what method he used to prolong his life, but it is not natural, and Harry will be forced to fight him in the future. He needs to learn about the outside world, and the factions that live in it." Lily coughed harder and some blood came out of her mouth.

"Lily." Serafall motioned to steady her only for the red head to shake her head.

"Harry needs to get away from Britain, away from the wizarding world." Lily looked Serafall in the eye. "The best protection is through you, that is why I have called for you."

"And you paid quite the price for it." Serafall looked sad at this. "Are you sure you want this?" Lily managed to convey her message with a resolute glare. Serafall closed her eyes and sighed heavily. No matter how much she smiled to hide her emotions, moments like this would have them coming out, especially when an innocent would sacrifice their lives for another innocent.

She opened her eyes to focus on Lily, a pair of bat wings appearing behind her while a magic circle formed around them, casting an eerie light in the open room that could be seen outside through the open hole. Her eyes glowed a bright blue as she spoke firmly. "In accordance with the contract, I, Serafall Leviathan, Third of the Four Satans, hereby acknowledge the last request of my contractor, Lily Potter nee Evans, to take in her son and raise him outside of Britain. I shall take him into my family and cherish him as one of my own blood, and protect him from those who seek harm on him." The contract paper in Lily's hand glowed a bright pink at that declaration before crumbling to ashes. Lily however looked relieved at her words and focused on Harry as her eyelids grew heavier.

"Harry, Mummy is going to take a long nap." Her hand shook to cup his cheek as she gave one big smile for him. "When I wake up, I will be seeing you then. Make sure you listen to Sera, and take care of yourself. Until we see each other again, know that I will always love you." With those words and a last breath, her hand dropped to the floor with glassy eyes that had tears running down her face and a small smile on her face. Her body glowed a light green before the light moved from her and transferred itself to Harry, making him glow the same colour as his eyes grew heavy and he ended up sleeping.

Serafall kept silent as this happened, her mind bringing up memories of her interactions with the young woman since her childhood when she had granted her the contract paper and all that had gone on. It was times like this she cursed the longevity of devils that could outlast humans. But she could not afford to get too sentimental at the moment. With a flick of her hand, Lily's body started to shift and move until she was laid on her back with her hands folded on her stomach. Serafall then reached to touch her head, let out a breath, and focused on extracting the memories from her mind and organising it properly inside her own mind so that Serafall can have a reference for what was going on.

A minute later, the room rumbled from the wave of energy that Serafall was unconsciously leaking out as a scowl appeared on the youthful face.

Lily was right, the family got betrayed by a lot of other people intent on getting their hands on Harry. But what the human may not have realised were the number of compulsions and memory charms that were on her, and the few memories Serafall had unlocked have a very telling theme to them.

Serafall could see what was going on between the lines and knew that Dumbledore was going to be a big problem. She also could yell that she did not have a lot of time at the moment and needed to act quickly to protect him.

Serafall conjured up a circle to keep Lily's body inside a dimensional storage and got up from the floor to move downstairs, pausing to look at the pile of dark robes with a glare that ignited the robes into a blaze and caused them to be reduced to ashes quickly. Another flick of her hands had the items in the room moving into a different storage space which remained open as she moved along, each room having their doors open to have all the objects moving inside, ranging from something as small as a coin to large items like the furniture. By the time she went down the stairs, the entire upper level was stripped of anything valuable.

Serafall went to the body of James Potter while the storage circle went about the place to grab everything else. She did the same thing with his memories and afterwards stored his body separately while her mind went through his memories quickly. James Potter was quite the reckless man in his youth and even as an officer for the magical world, he was still a little too trusting of some people based on their affiliations alone. But he had a lot more information based on the interactions, and from there Serafall could make more deductions on the matter.

Clearly the parents were set up to die, perhaps with Harry dying as well, but his survival and Lily's words gave her the impression that in the event of his survival, he would be set up as a lamb for slaughter in order to get rid of the one they call Voldemort, and be easy pickings for anyone seeking to control him.

As it stood, she had precious hours left to get this sorted, and there was only one place in Britain that she could try to secure the situation based on the memories acquired, and that was Gringotts, the goblin bank slash nation. She was familiar with the goblins of the different countries from her role as a diplomat, but in Britain, they were not the easiest to work with even at the best of times due to their views towards wizards and those deemed weak for not fighting to the death. At their absolute worst?

Well, there was a reason why goblins have quite the bad reputation in stories and in a particular manga about a crusading knight going on a rampage against goblins for what they did to his family.

The storage circles had finished storing James Potter's body and the items in the house, leaving it bare and only the blood stains showing what had happened in the house. Serafall looked at Harry secured in her arms, the poor boy tired out from all that had happened. She would make sure to take care of him, and who knows? Sona might like the idea of a little brother to play with.

With that in mind, Serafall activated the magic circle to take her to Gringotts, not knowing that a greasy haired man had entered a couple of minutes later only to look about in confusion, then a half-giant arrived as well along with a dark-haired man hoping to find his godson. The latter two would have the benefit of knowing Harry was safe as she left a monitoring golem to check who they were before telling them briefly what had happened, and making sure that the dark-haired man called for the Aurors to prove his innocence before he attempted to be stupid.

And within a day, Serafall Leviathan would bring young Harry Potter to the Underworld where he would be raised by her family, and in so doing, would disrupt the plans of a certain meddlesome wizard who cursed the fact that someone got to the boy before him, activated the wills of the adult Potters, and had the vaults sealed up tightly in Gringotts with all keys confiscated or deactivated. And try as they might, people would not find Harry Potter for a few years.

After all, who would expect a family of devils to look after a human boy?

Author's Notes:

So someone had challenged me to write a crossover story idea with Highschool DxD. Admittedly I was not sure, given how my other story is fluctuating between good and bad. I decided to give it a shot, but wanted to make sure it was different in some manner, because most of the crossovers have Harry coming to Kuoh as a kid, adult or some mishap, and then we have Harry already as a devil, or a female Harry who is a twin of Rias, etc.

Then it hit me that there are no stories of Harry being adopted by the devils, and as if I got a visit from Zelretch, I have the sudden urge to have Harry raised by the Maou Shojo and see chaos being unleashed. "Insert evil laughter"

For this story idea, I would say that Serafall had a contract with Lily when she was a little girl who wanted friends. She will be a bit more serious on account of her trying to raise Harry either as a sibling or an actual son. Not sure which one, and for those who want Sweet Home Yokohoma, I have no idea about it.

For a possible challenge, Issei and Saji would not be around, which only means Harry gets all the hotties XD