Boku no Futanari Kanojo! ~Zetsurin Shoujo to Junjou Shounen~

The main character “Kazuya Yamano” is touched by the kindness of “Aoi Kannagawa” and falls in love with her. One day, Kazuya confesses his feelings to Aoi, but her reply is ambiguous. The reason is that Aoi is a hermaphrodite and she is conflicted about her own gender.

Aoi, who has come to a point in her life where she has to make a decision about her own gender, put a condition on Kazuya: “Even if I become a man, are you sure you can still love me?

[From official site]