Onee Danshi to Himitsu no Koi

Working for a toy company, Kazuki has been going to a transvestite bar for the past year.
For some reason, she and the owner, Mama, get along very well, and they even discuss their love lives!
Kazuki had a childhood sweetheart that she can't forget, and her current love life is not going well.
On her way home after a late night of talking at the bar, she realized she forgot her make-up bag and returned to the bar, and she overheard Mama talking in a man's language!
Kazuki was a little nervous when she remembered that Mama had once told her that her love interest was a woman....
The next day, she bumped into her childhood friend Keisuke...?

A "woman" and sometimes a "man", who is she really?
A reunion love story starting from the very beginning between two grown ups...!

(Source: Renta, translated)