Natsumi is troubled by a lack of sex with her husband and feels insecure about her voluptuous figure. One day, her son feigns illness and asks her for handjob and blowjob. Unable to refuse, she pretends to be indifferent while tending to her father-in-law. As her father-in-law suckles her large breasts, Natsumi becomes aroused. Caught in a web of carnal desires, she is overwhelmed by the sexual demands of her family. Amidst tangled lust and physical relationships, this story depicts the voluptuous mother screaming in ecstasy as she succumbs to pleasure.