Aya lives with her husband and daughter-in-law. On the surface, things are going well, but she hasn't had sex with her husband for a while, and every night she releases her pent-up sexual desire by masturbating. One day, she spots her son-in-law, Takeshi, who is also alone and feeling the same way, sexless with his daughter, and his huge cock... Captivated by his cock, Aya invites him in day and night, saying, "I'll take care of you for you," and continues to milk him. And the son-in-law is completely captivated by his mother-in-law's alluring charm, which his wife doesn't have...