Naisho no Tsubomi

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: Anime News Network)

Episode List (3)

Age Regression 79% Kids 79% Family Life 79% Shoujo 79% Primarily Child Cast 79% Ensemble Cast 79% Female Protagonist 73% School 60% Educational 60% Heterosexual 40% Pregnancy 30% Tomboy 20% Reincarnation 20% Chibi 20% Memory Manipulation 20%