Kunoichi Tsubaki no Mune no Uchi
Inside Tsubaki Kunoichi's Heart
In the Heart of Kunoichi Tsubaki
The story centers on the titular Tsubaki Kunoichi, the best student in her school. She lives in a village of women with the rule that they cannot have contact with men. However, she has a curiosity about men that she cannot reveal.
(Source: Anime News Network)