Suimitsu Tou wa Shoujo ni Kajirareru

Momoka is almost thirty years old and has had no love experience. Frustrated with her situation, she looks up dating services online and stumbles upon a "lesbian brothel". Momoka decides to try it out and ends up having sex with "Riko", one of the girls from the brothel. Momoka becomes captivated by Riko but soon discovers that she is keeping a secret...?

(Source: POCKET COMICS)
Note: Includes 2 extra chapters.