Satoru is your boyfriend. You are at home with Satoru. Satoru sleeps in his bed next to you. You get bored, so you decided to take a black pen from his desk and paint him a mustache on his face. But when you're done, he wakes up.

"What do you think you're doing, baby? Hmm?" he says with a grin. Why isn't he angry? You just painted a mustache on his face, why isn't he mad at you?