Sexually Insensitive Until I Met My Former Student at a Brothel

Official Translations:
English (Coolmic, MangaPlaza, Renta!), T.Chinese, Korean

"I wish I'd never known a pleasure like this..."

Haruka's sex life with her boyfriend has hit a wall, so at her friends' suggestion, she visits a brothel for women.
There, she unexpectedly runs into her former student, Natsuru Yuzuki.
What starts as simple "practice" quickly spirals out of control, as Haruka finds herself completely overwhelmed by the pleasure he gives her...