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
as Haruna Mochida
麻生久美子
as Teacher Yagi
宮崎美子
as Haruna's mother
谷村美月
as Haruna's older sister
草村礼子
as Haruna's grandmother
斉藤暁
as Haruna's father
榎木兵衛
as Haruna's grandfather
北見敏之
as Mitsuo's father
深水元基
as Mr. Kobayashi
伊藤梨沙子
as Mika Yoshida
Yūya Kawamura
as Hiroyuki Tsurumaki
Ayaka Okuma
as Mayu Asakura
