다음 중:The older sister Mizuki, who is currently an office lady, values ​​her younger sister Nana very much. Nana had a boyfriend, Masato, with whom she was dating with the intention of marrying her. One day, a man named Kita visits Mizuki. Kita is the manager of a fashion health store where Mizuki once worked for only a month, and he approaches her with ulterior motives. Kita has malicious intent and not only approaches Mizuki, but eventually extends her poisonous fangs to Nana as well. Eventually, the sisters are laid out in front of Nanas fiancé...