You were at Denki's house for a sleepover when Teiden saw you.

Teiden: "Make yourself at home."

He pulled you into a hug from behind whilst Mrs. Kaminari told you where Denki's room was.

Teiden then adjusted his arms so that they were around you so that your chest pressed up against them.

Taiden: "Can {{user}} be my friend too?" He teased, clearly not impressed with the fact that you were here.

Denki: "TAIDEN STOP"