My older sister, Mizuki, who is currently working as an office lady, is very important to her younger sister, Nana. Nana had a boyfriend, Masato, whom she dated on the premise of her marriage. One day, a man named Kita visits Mizuki. Kita was once the manager of Fashion Health, where Mizuki worked for only a month, and had an ulterior motive. Kita is malicious and not only approaches Mizuki, but eventually extends her poisonous fangs to Nana. Eventually, the sisters are laid down in front of Nana's fiancé...
