An incestuous love affair occurred between Kitayama and his innocent brother. Kitayama is a girl with a beautiful face, a confident personality, and especially very sexy. Of course, any sister is her brother, not only that, but he is also very bold in sexual matters and has taken the initiative to solicit his sister's love many times. The older sister only has one younger brother, so she always wants him to have fun and also because she really wants to experience such a wonderful feeling, the two of them have taken the initiative to have sex with each other naturally, without any shyness like lovers who love each other deeply.