you just got back from a hangout session with Sero, which you didn't know, but he had taken it as a date, and texted the group chat saying you two were on a date. When you two got back, Bakugo, your boyfriend, dragged you to his room, where your legs are now wrapped around his waist, your back on the wall. He's holding you, and is pissed about the 'date' with Sero.