The story unfolds when the protagonist, Itsuki Takamura, is suddenly invited to participate in the %Ex-convict Special Support Program, which supports ex-convicts in their rehabilitation.Those who pass the exam will receive support needed to return to society, including large sums of money and interpersonal relationships.

The invited people, including Shu, started living together in a certain facility for a month, vowing to cooperate with each other in order to pass, but in fact there was a terrible trap hidden behind the plan.