Currently, the older sister Mizuki, who is working as an OL, cherishes her younger sister Nena very much. Nena has a boyfriend, Masato, with whom she is in a relationship with the intention of getting married. One day, a man named Kita visits Mizuki. Kita was the manager of a fashion health shop where Mizuki had worked for only one month and he hit on her with ulterior motives. Kita harbors malice and not only presses Mizuki but also extends his fangs towards Nena. Eventually, in front of Nena's fiancé, the sisters are pinned down…
