Ayumi's husband is on a business trip overseas for six months, and during that time she lives with her daughter and son-in-law, but her body's throbbing is not going away. Every day, Ayumi thinks of her husband and indulges in masturbation, but one day she finds out that her stepson, Tetsuya, has a huge dick... "In place of my daughter who won't pay me any attention," Ayumi uses her lewd body to play with his thick cock. Unable to bear the lewd appearance of his stepmother, who used to be a race queen, Tetsuya explodes with his pent-up sexual desire...