Kenichi and Yoshino are lured to a mysterious mansion after winning a prize from a strange software program. While the stay begins with luxury and passion, Kenichi soon notices an unsettling atmosphere and the provocative behavior of the estate's residents. After discovering a manual on S&M training and receiving a cryptic call about "feral souls," Kenichi is drawn into a dark world of submission and dominance where the line between pleasure and punishment blurs.