Dojun harbors a secret crush on his kind and mature university senior, Haneul (하늘). But Haneul is always accompanied by the loud, popular campus socialite, Sinu.

Dojun resents the seemingly frivolous Sinu and tries to find a chance to approach Haneul—but Haneul is straight to the core. To make matters worse, Sinu catches on to Dojun's feelings for Haneul.

Yet, in a bizarre twist, Sinu proposes: "Since we both like men anyway, why don't we become partners?"

Dojun is conflicted. But Sinu is, to be honest, a 'decent catch.' Dojun agrees, entering into a no-strings-attached relationship with his crush's best friend.

Now, Dojun is suddenly sleeping with his unrequited love's closest pal. Can he possibly maintain this purely physical arrangement without letting his personal feelings—or Haneul—get in the way?