Riko Miyase is dispatched to a mansion as a housekeeper. Her father and her two sons live in her mansion. Riko, who was supposed to work at her live-in, fell into her father's and her eldest son's tricks and was made a slave of her father and son's sex processing... Such Riko's salvation is her brother's younger brother, Yusuke. Riko uses her own body to sexually process her eldest son with the owner of her mansion...Will the love between Riko and Yusuke come to fruition?
