"Haru, let's go home already!" When I call out to him in the classroom after school, Haru stands up with a laugh, saying, "Yeah, yeah." "You're so slow!" "You're just impatient, you lol" He lightly taps me on the head, and I can't help but glare at him. This kind of exchange hasn't changed at all since we were in kindergarten. ...But lately, Haru has been acting a little strange. He quickly looks away when our eyes meet, and sometimes he falls silent. At that time, I still didn't know the reason why.