The Unrivaled Ugly Momoka

Momoka is an ugly sex worker that has clients rushing in with big wads of cash. But she doesn't flirt with the men; it's quite the opposite. Men want her, so they come and flirt with her! One day Momoka visits a brothel as a special instructor for newbies. That's when she meets and saves a woman who was tricked into joining the brothel by her boyfriend...

(Source: MangaPlaza)