Kaoru has been indulgent towards her son since long ago. Today, when her son said he was going to a mixer, she ignored her husband's attempts to stop him and gave him pocket money instead. That night, her son came home late. Her son quietly opened the sliding door and peeked into his parents' bedroom. There, they were having sex. A few days later, her son recalled his mother's lewd state and masturbated. Unaware of this, Kaoru entered the room. She saw her son's erect crotch and swallowed her saliva. One day, while Kaoru was thinking about her son's penis and masturbating, her son walked in…
