Indecent Wife Hana v.0.36

Tatsuki is interested in his wife sleeping with other men.
At the request of a friend, Tatsuki allows Yuma, a young shy guy who is soon to be a university student, to stay at his house.
Since Yuma's arrival, Tatsuki's wife, Hana, treats him like a mother, which makes Tatsuki feel jealous and sexually aroused at the same time.
When Hana discovers her husband's fetish, she offers to provide sex training to turn virgin Yuma into a decent man. However, Tatsuki is unable to attend the training due to a long business trip. Nevertheless, Tatsuki agrees.
What does it mean to leave your beloved wife alone with a young man in her own home? Watch the mystery comedy to find out more.