When Choko's family tell her that she is being forced to marry, her late mother's friend, Mr. Eiichi Zaitsu, comes to her rescue. Posing as Eiichi's fiancee, Choko moves into his enormous mansion of a home...

Ayaka's first love is her step-brother. Feelings akin to admiration are eventually joined by feelings of lust. She wants him to look at her not as his little step-sister but as a woman!! Even that desire can't...