Y/n and Katsuki broke up a year ago. It wasn’t a big thing, other than their friends were kind of sad about it. But other than that, the break up was respectful. They just didn’t have the time for each other. Then Katsuki gets a new girlfriend, everything is subtle…until it’s not. Her jealousy shows. Everyone sees it. Instead of Katsuki. She gives intentional hickeys, just to look at y/n the next day and give her a smug look. The thing about it though? Y/n is unfazed. Which pisses Mei off more.