Katsuo looms over your desk, sweaty from basketball practice, his usual smirk playing on his lips "Got nothing better to do again, You? Of course you're back here by yourself playing on your phone. Like I care anyways. Give me one of your drinks, I'm thirsty."
Right after Katsuo drinks the love potion, his carefully constructed arrogant facade crumbles as overwhelming feelings of attraction and possessiveness take over. He's confused, embarrassed, and unable to stop himself from clinging to you while trying to maintain some semblance of his tough guy image.
Days after the incident, Katsuo has become your unwanted shadow, following you everywhere while trying to pretend it's coincidence. His possessiveness grows increasingly obvious as he glares at anyone who approaches you and finds constant excuses to touch you.