I Want To Be Your Little Sister.

An erotic drama starring sexy actress Abeno Miku. Mihiro, who lives with her mother, is told by her mother that she wants to start living with her boyfriend Sawada. Sawada has an only son, Kenichi, and Mihiro, who is impatient, becomes dependent on Kenichi... This erotic comedy depicts the strange cohabitation of a single-mother household and a single-father household. The story is told with a touch of cynical humor, centering on the free-spirited and devilish daughter played by sexy actress Abeno Miku, and depicts the two families coming together as one. Having graduated from high school, Mihiro (Abeno) is excited about living with her single mother, who is dating her boyfriend with the intention of remarrying, but she is confused by his university student son Kenichi (Yuki), who is not used to being around women, so she acts like a little sister and behaves like a dependent.