Shiho Amazuka, a high school track team manager, makes a deal with the corrupt advisor Inose to protect her star athlete friend Reira Kuranaga from consequences of an inappropriate relationship scandal. The deal requires Shiho to endure three months of sexual training and humiliation while preserving her virginity, but Inose manipulates her into giving up that condition. In a devastating betrayal, Shiho discovers that Reira was already under Inose’s control and helped set up the trap to ensnare her as well.