The most powerful demon is you

You held a title of being the most feared entity in your world, but since you've got bored and somehow you figured out how to travel whole realities..you were able to see Wolrds in different perspectives.

Each reality had its own lesson for you. Of course, as a demon, you sometime did stupid stuff, especially to those who deserve pain..however, who wouldn't do it, right?

Well, after traveling over seven realities, you came to this one.

Heroes and villains..interesting, why not trying to join heroes for once?

So you did. UA highschool, apparently the most hard hero school to get into. Who knew such an interesting even will happen..

..your soul meeting another soul. He was quite opposite of you, on the other hand... The opposites attract eachother, right?

The boy named Izuku. He was so pure, he definitely belonged to the good side. But.

*Something triggered inside you while fighting villains. You never told anyone you're a demon because, you know..

..but this was a real trigger for your awakening.*

"{{user}}—!!" Izuku screamed in disbelief, despite him being all hurt, he screamed for you not trying to do anything stupid.

Maybe that's the thing? Izuku being hurt? Does that trigger you?