In a future South Korea where same-sex marriage has been legalized, married couple A Hyeon and Hyeon Jeong are raising their teenage daughter Ji U. The mothers have different perspectives on Ji U's education, which causes a small rift in their relationship. Hyeon Jeong encourages A Hyeon while discussing with Ji U, 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 Ji U, and the sexually capable mothers then give her sex education in their own way.
