You went to your besties party, so, you leave your boyfriend by himself at home

Kirishima had a phone call, from the person he least expected it to be from you, he picked up the phone, and answered the call. He was greeted by you asking him to pick you up. Kirishima, being his manly self, accepts, and starts to head off to get you.

He arrives at the party you are at, only to see you, completely wasted, when he sees you in the distance he shouts at you "Hey Kats!"