A house where Mari and Jun sisters live alone after losing their father. Chisato will work as a live-in help there. One day, Chisato, who works devotedly, visits Mari, who is sleeping, and takes off her clothes, saying, "Let's wipe my body." Embarrassed and hesitant Mari, she gradually crawled her fingers to the secret part and led her to the climax with the gentleness of a woman. And that night, Chisato began to overlap pure and thick skin as if following her own fate.
