Hee-Soo, who has been single for 24 years and has grown up normally, finally has the love she has always dreamed of, but her fantasy is shattered by her first sleep with her boyfriend. So, she goes to a lesbian bar with her lesbian friend Jaeyeon while drunk and meets Joohee there. They are attracted to each other and end up kissing. Hee-Soo feels confused about her sexual orientation and feels guilty about her boyfriend. Confused, Hee-Soo visits the lesbian bar several times to meet Joo-Hee again, and finally meets Joo-Hee again. Just before the two leave the motel and head out, Joo-Hee sees her boyfriend's KakaoTalk message on Hee-Soo's phone. Joo-Hee, dumbfounded, leaves. Hee-Soo thinks she left because she couldn't do it, and breaks up with her boyfriend because she feels sorry for him. However, Joo-Hee already misunderstands that Heesu is still dating her boyfriend. Even while in a relationship with her FWB, Min-Young, Joo-Hee continues to be concerned about Hee-soo. Will Joo-Hee and Hee-Soo be able to properly convey their feelings to each other?