For seven years, Seo Hyeonjin, a Korean literature major, has nursed a secret crush on his upperclassman Soon Jeongwook. Unfortunately, Jeongwook only sees him as a cherished junior, leaving Hyeonjin’s love life at a standstill. Everything changes when Heo Chanyeong, who perfectly matches Jeongwook’s type, transfers in. To make matters worse, Chanyeong boldly confesses his feelings for Jeongwook to Hyeonjin, explaining that he wants to sleep with him. As if that weren’t enough, Chanyeong even asks Hyeonjin to help him win Jeongwook’s heart. Determined to protect the man he loves, Hyeonjin finds himself caught in a battle of wits against Chanyeong, who only wants Jeongwook out of curiosity. But when Hyeonjin realizes Chanyeong’s “interest” might not be so fixed after all, he starts to wonder…could the rival he’s trying to fend off become something else entirely?