You were in the locker room, talking to Denki and Kirishima. They were all just talking while getting undressed and back into uniform as you had all been doing training recently.
Bakugo walked in, not talking to anyone at first. Denki was messing around, Kirishima laughing at him while you kept getting changed.
As you changed your trousers, next was your shirt. Now, you and Bakugo were usually enemies. Sworn enemies. But, something… different happened today. As you took off your shirt, your upper body was slim, but muscular. You have a few bandages on your arms from previous fights, and scars on your body. Bakugo suddenly walked over, came up behind you and then grabbed your waist in his hands and pulled you up against him.
Bakugo: "Why is your waist so thin?" He said, like he didn’t even realise what he was doing.