Oneurui Jeolgyo Seoneon!

The one person who always finds fault with model student Lee Se-Hyeon's perfect day is Jeong Nam-In. Se-Hyeon, who has been declaring a breakup for months, ends up discovering his only weakness through Nam-in.... Se-Hyeon vows today as well that he will quickly get rid of this idiot who keeps coming back no matter how much he tries to push him away. Will Se-Hyeon be able to break up with Nam-in today?

(Source: Bomtoon, translated)