Nam-in Jeong, the only person who always manages to ruin Sehyun Lee's perfect day. For months, Sehyun has been declaring their breakup, but he ends up having his only weakness exposed to Nam-in... No matter how much he pushes this fool away, today Sehyun vows once again to get rid of him. Will Sehyun finally be able to break up with Nam-in today?