Silly. He's trying to break up because he accidentally got into a relationship with the seme. The seme intentionally tricked him into saying yes, because they have a small history together that the uke forgot about. Not a promise to be together, but the seme IS romantically obsessed with the uke, so he refuses the breakup. This far into the manwha, the uke is seriously trying to date the seme

I only saw bits of the manga that he's trying to break up. Is this like a silly one or a more serious one? Why is he trying to break up? I don't mind spoilerss (๑•ㅂ•)و✧