After being penetrated by her father-in-law, the daughter-in-law, Seiryuuya, learns the true pleasure of sex. (VENX-168)

Duya, who lives with her husband and his family after marriage, doesn't really like her father-in-law, especially his gaze, which makes her uncomfortable. Whenever her husband is at work, the time she spends alone with her father-in-law is extremely painful; she even worries that she might be attacked one day…