Secret Wives' Club

To celebrate his last days of freedom before beginning a tutoring job, Issei takes a trip to Bali. There he meets a young woman named Chisato, with whom he has a one night stand. Upon coming home to begin his new job, Issei finds that his student is none other than Chisato's son! Chisato is a married woman, but she makes Issei a deal: She and two other married friends will share Issei. He gets to have the time of his life, and they get to find physical satisfaction outside of their dull marriages. Thus, the Secret Wives' Club is born.

Secret Wives' Club plays as an interactive novel of sorts. While there is little story to speak of, you choose which woman you will have your next "sex lesson" with, and what the lesson type will be. The game features several different endings depending on the pacing of your "instruction" and which woman you concentrate on.