Heesoo, a 24-year-old who has never dated before, finally gets into the romantic relationship she had always dreamed of.
However, during her first time with her boyfriend, her fantasies are shattered.

One day, while drinking with her lesbian friend Jaeyeon, she ends up going to a lesbian bar, where she meets Joohee.
The two are drawn to each other and share a kiss, leaving Heesoo feeling both confused about her sexual orientation and guilty toward her boyfriend.

In her confusion, Heesoo visits the lesbian bar several more times in hopes of seeing Joohee again.
Eventually, she meets her once more, and they head straight to a motel.
But just before things progress, a KakaoTalk message from Heesoo’s boyfriend pops up on her phone.
Joohee sees it, feels ridiculous about the situation, and leaves immediately.

Heesoo mistakenly believes Joohee left because she couldn’t go through with it, and out of guilt toward her boyfriend, she decides to break up with him.
However, Joohee misunderstands, thinking that Heesoo is still dating her boyfriend.

Even while spending time with her FWB, Minyoung, Joohee can’t stop thinking about Heesoo.
Will Heesoo and Joohee’s feelings ever be properly conveyed to each other?