For this vacation, Mayuki invites her husband for a trip, but he takes her to his parents’ home instead. His mother passed away, leaving his father alone in a big house. He wants a grandchild soon, but for two years, they’ve barely had sex, let alone conceived. Back in the countryside, Mayuki’s husband ditches her to hang out with friends all day, leaving her lonely. Longing for sex, Mayuki masturbates to ease her arousal, and her father-in-law sees it all. He offers to satisfy her in his son’s place. Though she refuses at first, his big, hard cock makes her climax repeatedly. Conquered by it, she seeks him out for sexual fulfillment. During their week there, while her husband is out with friends, Mayuki and her father-in-law freely indulge in sex all day...