Haikei, Seken-sama.

A hidden youth depicted by an LGBT creator. Some 10 years or so ago, a high school student from a regional town named Rino Tachi went to an all-girls school, studied here and there, and enjoyed talking with his female friends. He was an "ordinary" girl, except for his pervasive feeling of unease within his body. A story of "love" set in a time that demanded even more conformity than now, about living one's fullest life while hiding the discontent. A story about searching for oneself.
(Source: Anime News Network)