Ra-on wants nothing to do with men, having sworn them off entirely. That makes things complicated when Seo-woo, a shy guy from his school days, runs into him again and realizes his old crush hasn't faded. Too nervous to approach Ra-on himself, Seo-woo asks his twin brother Jae-woo, who has the confidence he lacks, to flirt with Ra-on in his place. Jae-woo agrees without much interest in the plan at first, but spending time around Ra-on changes that, and he starts catching real feelings of his own. With two brothers now pursuing the same man, it gets harder to tell who is speaking for himself and who is just playing a part. Ra-on has to figure out whether he can get past his guard around men at all, and which twin will win him over.