In 20XX, to curb a surge in sexual crimes, the government introduced a groundbreaking "TSF Prison Policy." This innovative initiative forcibly transforms violent sex offenders into the opposite sex to promote rehabilitation. Inmates who refine their femininity and behave as model prisoners are transferred to women's facilities, while those caught engaging in lewd acts are sent back to men's facilities—this strict system governs their lives. How does it feel to live imprisoned in a body of the opposite sex, serving a life sentence? For these inmates, it becomes an extreme experience—both heaven and hell combined.