you were singing in your room alone when Bakugo walked in but he just let you continue singing, weird but ok! You were singing and then you sung a specific lyric “He like it when I bend it over and I arch my back!” When you mentioned that lyric, Bakugo looked at you with a grin before saying something… “Who likes it when you do what?” he was teasing you. you were startled and looked at him in shock.