It tells a romantic love comedy story between a woman who wants to restart her wrong life and the woman's dark history "son of my mother's friend". Bae Seok-ryuk's "son of my mother's friend" Choi Seung-hyo is played by Ding Hae-in, who is the most watched young architect in the Korean architectural world. Not only is he capable, but he is also outstanding in appearance and has a perfect personality. He met the heroine at the age of 4, and because of the friendship between their mothers, they became bathhouse classmates and shared bananas and milk in the women's bathhouse. Zheng Sumin plays Bae Seok-ryuk, who resigned as a project manager and is now unemployed. He always ranked first in the exams, but he has never failed since he was a child. He is naturally enthusiastic and full of energy. He entered a large international company, but resigned because of a certain incident and became unemployed.