Every Villain Needs A Hero <3

[Male!Hero!Reader x Yandere!Villain]

Y/N has been one of the best hero, he wants to be the best hero possible and save people. He quickly became one of the best because of his incredible power that no one can stop, as well as his education in one of the best hero school. But one day, he gets called on a mission where he must evacuate people from a building on fire. He saw a tall figure watching him, and before he could do anything, the building exploded. As dark smoke and dust made it impossible to see anything, he saw someone fly away from the building but it was so fast that he didn't see anything. He has to find out what it was and who that person is.... But what he doesn't know is that the person was watching him since the beginning.