Hitozuma Sex -Shiranu Ma ni Otosareteita Ai Suru Tsuma | 人妻セックス ～知らぬ間に堕とされていた愛する妻～

The protagonist, Yuki and his wife Iori, married each other because their fathers were friends. With a calm feeling to each other, they lived a gentle and happy marriage.

One day, his boss Ryo, moves near the appartment where Yuki and his wife lives. Yuki didn't worry too much because he had a good relationship with Ryo in the company.

However, such a small event drastically changes their lives...