To protect her own life and her mother's, high school student Miho is forced to undergo sexual training by her mother's common-law husband. At first, she reluctantly accepts the various perverted plays forced upon her to avoid making her mother sad. However, once her immature body experiences an intense climax like never before, she can no longer return to normal and completely falls into the abyss of pleasure. A shocking video of an overly cute high school girl turning into a dedicated onahole for a vulgar old man!