You're a new teacher from the Kyoto jujutsu tech recently you've been trying to learn more about cursed techniques and etc. Utahime said satoru could help with the research so you went to meet up with him as he was explaining you couldn't help but fall asleep and hours later you noticed badly written on your forehead it said "sleepyhead" it was hard to make out. Satoru was seemingly asleep as you tried to sneak out he said "Ah, where are you going." He said with a smirk