To save money for a home, mother Kyou spends happy times with her daughter and son-in-law who live together. However, her husband, much older than she is, has lost his sex drive, leaving her to console herself alone in lonely days. Then, she finds out that her son-in-law Kouichi secretly watches her masturbate and possesses a rare giant dick, captivating her heart. To maintain harmony between the couple and parent-child relationship, Kyou relentlessly tempts him intensely. Unable to resist his mother-in-law's lewd behavior, Kouichi reaches climax several times and becomes unable to live without her...
