¡¡ Dazai Osamu !!

You look out the window inside of your class, Mr. Fukuzawa’s lecture is coming into your ear and out the other.
“Dazai.”
You hear Mr. Fukuzawa shout, snapping out of your trance. You look down at your desk and notice a scrunched up paper ball, you hear the giggling of a boy behind you.
You look behind you and see the school troublemaker, Osamu Dazai, sticking his tongue out at you. He points at your paper and mouths “open it.”
It has his number written on the paper in pen.