A struggling actress agrees to a fake marriage with a wealthy heir to help him hide his homosexuality, but their plan is threatened when his ambitious younger brother grows suspicious and seeks to expose the truth.

"A young man in his 20s loves and has a strong sexual desire for Seon Hee. She is a fresh college girl who always dreams of a romantic kiss with her first love. She has participated in various community service activities for her father, a third-term city councilor. There was one volunteer activity that she went only for herself. The nursery where her first love Jin Soo is. Jin Soo is the son of the head of the nursery school. Seon Hee runs to see Jin Soo who is always gentle and warm. There's a sweet suggestion for Seon Hee. To have her first kiss with Jin Soo. Will Seon Hee be able to defeat her rival and succeed in a sweet kiss with Jin Soo? ""I asked you to go"" Another young man, Joon-seok, is worried about the same but for different reasons. Seon Hee, I love you... His first accidental kiss with Seon Hee but it's just an accident. He is worried about Seon Hee, who considers him only as a younger brother and a junior. Joon Seok, a pure young man who has to be seen while doing the same volunteer work... Will his first love with Seon Hee ever come true?"

A lingerie designer's professional passion leads to hilarious misunderstandings, sparking an unexpected connection with a fellow designer who challenges his reputation.