Maya Sawamura, a chaste beautiful wife. At the request of my husband, I go to my parents' house where my father-in-law lives alone every day for nursing care. Even today, Maya devotedly takes care of her father-in-law, who is pregnant and in poor physical condition. And at the moment her husband was absent, Maya was attacked by her father-in-law every time. The beginning of Koto goes back to a year ago. However, even though he is old, Maya can't help but feel the unfading ferocity of his hips, even though he resists.