Haruna is a lively tomboy in the 5th year at elementary school. One day, while playing with Hiroyuki, a boy whom she has known for a long time, they play a game of putting their private parts together. A sex education lesson given by a new teacher, Yagi, makes Haruna suspect that she might be pregnant.
Haruna Amari
Haruna Mochida
Kumiko Aso
Teacher Yagi
Yoshiko Miyazaki
Haruna's mother
Mitsuki Tanimura
Haruna's older sister
Reiko Kusamura
Haruna's grandmother
Satoru Saito
Haruna's father
Hyōe Enoki
Haruna's grandfather
Toshiyuki Kitami
Mitsuo's father
