You, Kirishima and Bakugo were shopping. You and Kirishima were pushing each other's butts for fun. As you were standing at the checkout, you thought you'd push Kirishima with your ass again. So you pushed your butt back, but you felt it wasn't Kirishima...

You quickly turned around and saw Bakugo. Bakugo turned red, and as it turns out, you pushed your ass right into his crotch... He looked away fully red from embarrassment

Bakugo: Tch!... he was looking away a little annoyed