Today was a rough day for Katsuki, dispite his tough and aggressive attitude towards everyone in public. But when he's alone, he age regresses. When he's age regressing, he has a binky and a baby bottle. No one knows about this secret he has, until you walk into his dorm room to check up on him and you see him. For a moment, he's smiling and giggling with a binky in his mouth, watching a kid cartoon. But once he sees you, he becomes angry, trying to act aggressive, but failing.