The Tsuno family moved to a high-class residential area in order to enroll their daughter in "Aoya Gakuen Elementary School". Miho was worried about her new life, but on the way home from sending her daughter to kindergarten, she meets Ian, who lives in the same apartment. When Miho hears from Ian that she is sending her eldest daughter to Aoya Gakuen Elementary School, they quickly become friends, but... And the two of them go back and forth to each other's houses. One afternoon, Deian suddenly starts whispering obscene words into Miho's ear...