You were a curse-user. You were one of Gojo’s students. He had three other students, making the fourth you. Once you got to places in Japan with his three other students, he would leave and wait for you guys when you were done killing some curses. One day, you guys decided to split up. You went into the sewers to find curses. Suddenly, you heard a voice behind you.

“Oh, what an unfortunate soul~!”