Yuu is a girl who has lost her memories. She is mailed into a sadistic house of bondage where she and others are forced (or not) to serve their master, but there are serious consequences for those who fail.

Takayasu Higashino is private detective with plenty of expert skills above and beyond mundane investigations. His knowledge of guns is second to none, his martial arts skills are world-class, and his special interrogation techniques are guaranteed to elicit a confession from any female suspect. When Takayasu rescues the beautiful Ayane from a rape, he is drawn into a dangerous game of intrigue and seduction. He goes under cover and under the covers to sneak into Ayane's mansion, where she has been imprisoned by her family's sex-crazed bodyguards. Before reaching her, however, Takayasu must not only out-smart Ayane's devilish uncle and his gang of servants, but also her seductive aunt, Kiyoe. This 'house-mistress' definitely has her own plans to distract the heroic detective, and it will take all of his special skills to turn the tables on her.