​In this episode, an elite high school’s dark secrets are revealed. The school operates a sinister business, sending sex slaves to colleges in exchange for hefty contributions. Disposable teachers, known as trainers, are responsible for training these sex slaves while keeping everything under wraps. Talented men are hired as temporary teachers and, if they show promise, are given a test. The “test” is actually instructing problem students, but it serves as a guise for training sex slaves. Simazu, a former teacher expelled for an affair with a student, is hired as a temporary teacher in this school of last resort. When offered the role of trainer, he sees no choice but to accept. Determined, he begins using his students as his own personal playthings.​