A married woman's obscene kiss and sex - The lewd tips of her step-sister and step-brother intertwine

After marrying his childhood friend, his wife Mizuki ends up living at his family home. On the surface, the marriage was a happy one, but there was one thing that bothered me. It is his brother-in-law, Kazuo, who is a shut-in. Worried about Kazuo, who was also a long-time friend, Mizuki decides to head to his room. Although he is confused by the reason he finds out about his shut-in, he tells him he wants to somehow help him... Kazuo, who is upset, forcefully steals Mizuki's lips. Mizuki's body gradually becomes more and more excited when the persistent and intense kiss her husband doesn't have...