Adult PC Game: Wonderful Mother and Loving Wife Becomes Her Boss' Mistress - Final by Free Lewdness Party/Milk Tank Ladies Monthly (Eng) Archive

The overall story is about convenience store employee Matsuhiro Sakurai starts a relationship with his friend Kazuma's mom who comes to work at one of his stores. Her being married is not an obstacle.

This is a Kinetic Visual Novel game. Involves clicking through the story with some choices being given which will affect certain sex scenes you may receive. Point and click mechanics.