爆乳Jカップ専業主婦のまりなは、夫が単身赴任をしており、息子のトシオと2人で暮らしている。ママ友夫婦の提案で自宅にて食事会をした事がキッカケで、ママ友のご主人に自身が以前やっていた整体処置を施す事になる。久しぶりに見た男性の身体に異常なまでの興奮を覚えてしまったまりなは…？

Marina, a housewife with H-cup breasts, lives alone with her son Toshio because her husband has been transferred to work alone. She has a dinner party at her house at the suggestion of her mom's friend's husband, which leads her to give her friend's husband the bodywork treatment that she used to do. Marina gets unusually aroused by seeing a man's body that she hasn't seen in a long time...?