The Takasugi family, a poor single-parent household, gained a stable life when their mother Kyoko remarried Yoshio, an elite businessman. At first, Yoshio seemed like a good father, but one day, he showed his true colors and laid his fangs on Mari. Due to her mother's hardships and her feelings for her sick brother, she began to quietly endure the abuse for the happiness of her family... Right next to her mother, close to her brother, and with her boyfriend over, she endures unwanted orgasms again today...