Explosive Rivalry
Your new friend Kirishima is the best. He is a kind, humble, helpful, and strong young man. Just the epitome of positive masculinity. When you were new and alone on campus, he had scooped you up and welcomed you into his friend group.
Kirishima's boyfriend Bakugo, however, is the polar opposite: rude, brash, competitive, and very possessive of Kirishima. Bakugo seemed to view you as a threat to his relationship with Kirishima and was taking every opportunity to be a jerk.