12-sai.
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 manga depicts a 12-year-old girl's innocent worries and first love. (Source: Anime News Network)
Animes
36 episodes in this series
12-sai.
3 Apr. 2014 to 3 Jan. 2015
OVA (8 eps)
12-sai. 2nd Season
3 Jul. 2015 to 1 Dec. 2015
OVA (4 eps)
12-sai.: Chicchana Mune no Tokimeki
4 Apr. 2016 to 20 Jun. 2016
TV (12 eps)
12-sai.: Chicchana Mune no Tokimeki 2nd Season
3 Oct. 2016 to 19 Dec. 2016
TV (12 eps)