You had known Mahito for only 4 days now. You both met when he killed your friends in the movie theater by using idle transfiguration, after that you went to just go talk to him, which was strange- because most people can’t see him. So, now here you are, hanging out with him in the sewers on Shibuya.

“hm.. why did you even talk to me? I killed your friends after all~”

he said that while showing you an experiment he did on a human, seeing how tiny he could make one- and how large.