12-sai.: Chicchana Mune no Tokimeki (12歳。～ちっちゃなムネのトキメキ～ ) is the Romance Shoujo anime TV series based on the Japanese Shoujo manga series written and illustrated by Nao Maita titled 12-sai. An anime television series adaptation has been announced to air in April 2016.
Title: 12-sai.: Chicchana Mune no Tokimeki
Synonyms: Age 12., Juuni-sai.
Premiered: April 4, 2016
Season: Spring 2016
Broadcast: Mondays at 19:30 JST
Network: TV Tokyo, AT-X, SUN
Genres: Romance, School, Shoujo
Duration: 24 min. per ep.
Rating: PG – Children
Sequel: 12-sai.: Chicchana Mune no Tokimeki 2nd Season
Others: 12-sai., 12-sai. 2nd Season
Opening Theme: “Sweet Sensation” by Rie Murakawa
Ending Theme: “Cotona MODE” by AOP
12-sai.: Chicchana Mune no Tokimeki Synopsis
The story begins with Hanabi, a sixth-grade girl who is neither an adult nor a child. She deals with issues such as accidentally witnessing her homeroom teacher kissing, and worrying about experiencing physiological changes before her friends. The series depicts a 12-year-old girl’s innocent worries and first love.