12-sai.: Chicchana Mune no Tokimeki
12歳。～ちっちゃなムネのトキメキ～ , Age 12., Juuni-sai.
The story follows Hanabi, a sixth-grade girl who is neither an adult nor a child. She faces things like accidentally seeing her homeroom teacher kissing, and worrying that her body will change before her friends'. The series shows a 12-year-old girl's innocent worries and first love.
