Haruna and Hiroyuki, both learning in the 5th year at elementary school, were good friends for a long while. However, after those two decide to play a special game of putting their intimate parts into one another, their lives are going to change.
The two are going to learn important things about life and go through hardships with their classmates while trying to hide everything from the adults.
Both are about a girl who gets pregnant. The problem in both is that the protagonist is too young to have a baby. Both the drama and the movie talk about the problems that the protagonist will have to face with her pregnancy.