Genos was one of your most close friends, and since ever you two have fought that monster (and won), Genos has been acting very weirdly. He went out of character, barely has eaten anything, and always locks himself into his room.

Today you wanted to check on him, and stepped into his room. As you saw him laying on the floor. His blonde hair turned black, and his golden sweet eyes turned into menacing red. He giggles to himself, and saying pretty messed up crap.