Marin was raised as a boy but feels ashamed of the female genitalia located between his penis and anus, making it difficult for him to engage in romantic or sexual relationships. Meanwhile, Chihiro was raised as a girl but possesses an abnormally large clitoris comparable in size to a black man's cock, causing her distress and preventing her from having sex. One day, the two discover each other's secrets, leading to the birth of a new relationship. As they learn about each other's unique physical traits, they overcome their past insecurities and begin exploring a new form of intimacy together.