Miki Ichinose is a 14-year-old schoolgirl who is very outgoing and cheerful. She lives with her parents and younger brother. She is in a romantic relationship with Satoshi Kirino who is 15 years old. They keep their relationship a secret from their parents because Miki is young and Satoshi is expected to excel in school and get into a university so he can take over the family business by his overbearing mother. One night, after a date, they sneak into a treehouse and consummate their relationshi...