Thinking that marrying a wife is to take care of the family and care for the members to help the whole family have a happier new life, but for the stepfather in the movie, it is different. He married his wife mainly to satisfy his sexual needs, and none other than his wife's stepchild was the one who helped him carry out this bad habit. Early in the morning, as soon as they opened their eyes, noon came, and then darkness covered everyone when they were asleep, all of these moments were in the educational calendar of the father and son. Although many times he was almost discovered by his wife/mother, with his very sophisticated sneaky and clumsy sex skills, the secret between father and son could not be discovered.