12-sai.
English title: Age 12
Japanese title: 12歳。
Type: OVA
Episodes: 8
Source: Manga
Genres: Romance
Studios: SynergySP, Ascension
Producers: Half H.P Studio
Duration: 11 min per ep
Rating: PG - Children

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: ANN)