POP!
"Bleehh!"
Once Harry side-along apparated them into the forest that Sirius liked to train in, the King watched as the boy he picked up threw up his lunch. And possibly his breakfast as well.
"What? What just happened?"
Hmm, was this when he was supposed to say, 'you're a wizard, Harry?' Hagrid never did a good job explaining things to him. He was left with more questions than answers and Harry wanted to do better.
"Well," he hummed a little before drawing his wand, cast an Evanesco on the vomit, and freshening up his breath. Tom had learned it for him and it helped a ton with morning breath. "Angels, devils, yokai, and plenty other of supernatural beings exist. We hide from the mundane world, but most every faction has individuals with the power to wipe cities off the map. After a great war, it was decided to separate humans from our world."
"Wait! You said our world. What's this got to do with me?"
"I was getting to that," Harry used the Flagrate charm to write 13 Longinuses in the air and started listed them out underneath it. "What's your name?"
"Issei Hyoudou," he said as he concentrated on the words being drawn in the air.
True Longinus. Zenith Tempest. Annihilation Maker. Dimension Lost. Boosted Gear. Divine Dividing. Regulas Nemea. Canis Lykaon. Sephiroth Graal. Incinerate Anthem. Absolute Demise. Innovate Clear. Telos Karma.
"God, the one with a capital G in Heaven, created a system to give powers to humans and part humans because they don't stand a chance against other supernatural races."
Issei watched in rapt, expectant attention. Who wouldn't want to hear this out of the blue while they lived a boring, normal life? He probably expected to be called the chosen one or some nonsense.
"These powers are called Sacred Gears," Harry continued. "You have one of them."
The boy new to the supernatural world looked like he was about to explode with glee.
"But you have so little magic power that no one had been able to tell by now. It's the only reason you weren't captured, used, or killed by now."
"What?" he instantly deflated.
Harry chuckled a little, "Don't feel too bad, I can tell you have a Longinus because of a special power of mine, you just need to unlock it."
"Special power? Then what are you? And why are you telling me this?"
Harry shrugged, "People kept things hidden to me my entire life. You will never be normal because of what you have. It's not like I don't benefit either, it'd be great if you joined my peerage. But to answer your question," he released his wings and spread his chilling fog of death, "I'm a devil."
Issei fell on his back and fainted.
============
"You know devils aren't all evil you know, I won't steal your soul or anything."
"That's what you tell me now? After you kidnap me and make me throw up everywhere! You probably did that on purpose to unsettle me and steal my soul!" Issei backed up and raised his fists.
In return, Harry rolled his eyes, "Give me a break. I'm helping you here. Just get into a stance that you think of as powerful and focus on a desire."
It took a little convincing, but Issei formed a Kamehameha and shouted to the forest.
Yet, nothing happened.
"It's not working! Are you sure I have this power? After the excitement wore off, I can't really think of myself as some chosen one. You sure you don't want my soul... or..." he backed away and covered his butt." Are you that kind of devil?
Harry groaned out loud. "Of course not. You aren't focusing hard enough. Tell me, what's your greatest dream, your greatest desire?"
The devil watched with amusement as Issei tightened his fists crouched down and started screaming to the forest, waving his hands, "Oppai everywhere! I'm gonna be HAREM KING and NOTHING WILL STOP ME! All the women in the world will come to me! Servants, soldiers, maids, onee-samas, mothers, best friends, everyone! KING OF THE HAREMS, ISSEI HYOUDOU!"
Harry couldn't help but groan again, "You know humans don't really do harems, right?"
"It doesn't matter!" Issei turned to him and pointed his finger out with passion. "I will not give up on my dream!"
"You know devils almost always have harems."
"What?" he yelled out. "That's so unfair! Are you saying you have one, asshole? Do you just want to rub it in my face? I don't care, I'm going to be Harem King anyway!"
"Devils can turn humans into devils as well," Harry said, ignoring his outburst.
Issei's jaw dropped and he turned to Harry in surprise. He couldn't even make a sound no matter how hard he tried.
"Devils only turn people that can help with their goals. People that use their Sacred Gears or have special powers," he continued without inflection. "And those special powers react to your willpower and desires."
The boy looked down, his hair covered his eyes as a serious air radiated from his body, "I get it. Fine."
Issei bent his knees and put his hands together.
"AAAAAARRRRRRGGGGHHHH!" he yelled without shame as his face turned red. "HAREM..."
Harry couldn't help but be amused, Sirius would love this kid.
"KING!" he finished as a flash of light covered his arm, showing a red gauntlet with a green gem.
Issei kept panting as Harry pulled out his chess set to consider how many pieces it was worth. The [Boosted Gear].
Even if it took two rooks, with that kind of power on his side...
A red teleportation circle appeared next to Issei before a girl with gravity-defying breasts, long red hair, and bright blue eyes appeared.
And Harry was trying to steal a Sacred Gear in her territory.
"Bollocks," was all he could say.