[I'm cumming! I'm cumming! Please destroy me some more...!] [Even after the orgasm, my father-in-law's machine piston continues, cumming inside me again and again!] The Ishihara couple lead a happy married life, but they don't get along at night. Nozomi's frustration is only growing... Meanwhile, her father-in-law, who lives with her, is still very much active and makes passionate love with her mother-in-law every day. Unable to bear the sound of his pistons resonating in her uterus every night, Nozomi one day launches a reverse night-time assault on her father-in-law. The father-in-law, who was confused, couldn't resist Nozomi's temptation and started pistoning in earnest! He kept making her cum with his unparalleled pistons...