Bubble de House de ***: Ofuro Maker no Showroom ga Sharehouse de... The Animation

Based on the erotic game by Atelier Kaguya Honky-Tonk Pumpkin.

The protagonist, a student, moves into a share house that offers discounted rent in exchange for monitoring a famous bath manufacturer's products. He had thought he didn't get the opportunity, but to his surprise, he's accepted at the last minute. After moving in, he realizes...