Humankatsuki Stories

(Crossposted From AO3) Though succubi were well-known and feared due to rumors of them only feeding off of sexual energy and feeding off people's life-forces, even if that was technically true in the very distant past, they lived rather normal lives and often only created other succubi or human boys. Very rarely did one ever create an incubus, happening once every three hundred years. Izuku was that incubus though wasn't born the healthiest. Unfortunately, his puberty hit him earlier than expected. He went to bed early, pain hitting him as he got under the covers. When he wasn't ready for school the next day, his friend tried to see what was going on only to hear his muffled screaming as pain wracked through his hot body and his stomach felt like several broken bones all at once. Aizawa was called, his room was entered, and he was rushed to the ER with fanged teeth latched tightly around the hero's capture weapon as he was wrapped tightly in his blanket.

(Crossposted from AO3) When Katsuki was little, he accidentally made a deal with a demon his age. Neither understood the grave situation, now bound together by their souls. Izuku, while rather small and a bit frail, was discovered to be very powerful...on a demon scale. To humans, he was quirkless and Katsuki protected him. They were practically attached at the hip, both honing their abilities and excitedly showing off how far they've come. It wasn't until high-school that they quickly learned that hiding Izuku's demonic nature was gonna be a lot harder than imaginable. Elementary and Middle School was easy. Nobody paid attention to the wall flower who seemed to vanish and reappear amongst shadows or how his eyes sometimes glowed or how it sometimes looked like he had horns. But at UA? It would have been easier to break into Tartarus.

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