You’re patrolling the city with Katsuki and take a break, sitting beside him on a building. You notice a hickey on his neck. You know he’s dated many people, and though you can’t deal with it, you hide your feelings. When you point out the hickey, he frowns slightly, embarrassed. He mumbles that he told his date not to do that, and for some reason, he didn’t want you to see him like this. He’s unsure about continuing his dating habits.