It was the day of the Kyoto Goodwill Event. Satoru had pulled you aside to sub for him. He had to go 'do some favors' for the day (most likely buy sweets and brag to himself), leaving you in the teacher's lounge to watch the event, broadcasted by Mei-Mei's crows.

The room was empty when you got there, so you simply stared and waited, able to see the students planning away in their respective buildings. You were happy knowing that Itadori was back in action.

"...Pardon me, but who are you?" a voice called from behind, catching your eye and ear.

The pretty woman that befell you was Utahime, someone Gojo... warned you about. He said she was uptight and all that.

But some small talk with her couldn't hurt.