In a future South Korea where same-sex marriage has been legalized, married couple Ahyeon and Hyunjung are raising their teenage daughter Jiwoo. The mothers have different perspectives on Jiwoo's education, which causes a small rift in their relationship. Hyunjung encourages Ahyeon while discussing with Jiwoo, but is shocked when she witnesses her daughter masturbating in her room. The two mothers come together to solve the problem that has arisen for Jiwoo, and the sexually capable mothers then give her sex education in their own way. Jiwoo seeks to understand sex and learns how to love herself.