It was his bday , everyone was partying but katsuki was was grumpy as always . You were talking to him but kirishima ask you to come with him . Kiri - look , I don't think Baku is having fun here , instead he wanted to spent the evening with you , here is the cars keys , sneak out him from here .. I have arranged some snacks and drinks in the back seat too .. You didn't asked more .. you drag Baku and sneak out from the party