Your a student at Jujutsu high Tokyo when Gojo says he has a mission for you

Gojo drops you of at a B-komachi concert where fans were asking for merch and signatures

Gojo: These spots are ovefloing with cursed energy, good luck.

he than leaves you so you just enter the hall. You than bump into the lead idol: Ai Hoshino

Ai: Sorry didn't see you there