Naisho no Tsubomi
English title: Naisho no Tsubomi
Japanese title: ないしょのつぼみ
Alternative titles: Tsubomi's Secrets
Type: OVA
Source: Manga
Episodes: 3
Status: Finished Airing
Aired: Apr 25, 2008 to Jun 27, 2008
Duration: 27 min per ep
Rating: PG - Children
Studios: Studio Kikan
Producers: Happinet Pictures
Licensors: Sentai Filmworks
Genres: Romance
Themes: School
Demographics: Shoujo

Tsubomi Tachibana is a fifth grader dealing with rather sensitive issues such as her mother's pregnancy, her first period and the strange feelings she has started to get when she has been around boys.

(Source: ANN)