Keiichi Hayama always dreamed of having hot sex with his beloved from childhood. But one day she transformed his dream into reality where in an unknown and mysterious beauty with beautiful breasts and seductive eyes she is towards him. The next day, Keiichi returns from school, and finds the same woman masturbating in his room. His mother represents her as Reika. Since her parents died in a car accident, Reika was accepted to live in Keichi's family. But Keiichi, becoming her sexual slave, knows that behind this woman there is some dark truth ... Will he be able to solve it?!?