Indecent Wife Hana v.0.26

Tatsuki is interested in his wife sleeping with other men.
At the request of a friend, Tatsuki allows Yuma, a young, shy guy who will soon 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 learns of her husband's fetish, she offers to provide sex training to turn the virgin Yuma into a decent man. However, Tatsuki cannot attend the training because of 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.