After graduating from university, Kaede moved to Tokyo to find a job and live alone. She ended up staying with her brother and his wife until she could find a place to stay. Kaede is secretly perverted and doesn't like her brother's wife, who reeks of eroticism. What's more, her brother is on a two-week business trip overseas. Her sister-in-law Rui plots to ignite Kaede's eroticism and make her her sex slave...