Adult PC Game: Hitozuma Sex ~Shiranu Ma ni Otosareteita Ai Suru Tsuma~ Ver.1.1 by Atelier Sakura Archive

The protagonist, Yuki, and his wife, Iori, are married through an arranged marriage as their fathers are acquainted with each other. Yuki and Iori have gentle personalities, leading to a relaxed and happy married life.

One day, Yuki's boss, Ryo, moves to a place close to where Yuki and Iori live. Yuki is not worried about this as he has a good relationship with Ryo in the company.

However, this small event will have a big impact on their lives...