Mini Pai Claimer ~Monku o Iitai no ni Oppai ga Kanjichau~

You play as a bra salesman whose latest product is designed to stimulate breast growth through massage. But customers are complaining that it also makes them uncontrollably horny, and it's your job to set them straight. Prove that these sexy ladies' urges are natural by engaging in all sorts of awesome sex.

[from J-List]