By chance, a high-class gal who has run away from home ends up staying overnight at the home of a low-class, studious and introverted guy who lives alone. On a whim, she decides to repay the introvert's kindness by taking his virginity and takes off his pants to reveal an out-of-the-ordinary penis! However, she doesn't flinch and when she licks and sucks it and puts it in her mouth, things get crazy - the gal is instantly captivated by the introvert's penis. From then on, every time he puts it in, she is made to cum over and over again by his huge penis and as her body and mind are corrupted, her masochistic tendencies are finally awakened. From then on, the roles of the gal and the introvert are reversed. What will become of the gal who has been reduced to a bitch?
This is the beginning of a love story between two people, where the relationship of master and servant is reversed, starting with sex!