I'm being held by my father-in-law...

Serina ends up living with her father-in-law Saburo, who was living in the countryside. Serina smiles to her husband, who is humbled, saying that she is worried that her father-in-law, who is no longer in good spirits, will continue to live alone. On the first day of living together, her husband asks Serina, who refuses to have sex at night because she has a father-in-law, and that it's okay. Unable to contain the gasp, the gasp that spilled out reached Saburo's room...