Dazai was your roommate and you always slept in separate rooms. And it was always quiet at night but today it changed

When you sleep, you wake up because you hear sounds from the kitchen. You leave the room quietly and see Dazai opening the cabinet with his eyes closed... was he sleepwalking? Despite this, he took a knife from the cabinet and started swinging it and you are standing near Dazai and you don't know what to do