"You will choose amongst yourselves with a majority vote. You are the ones to decide. Who is unnecessary, the most hateful, who is ok to die."

Out of concern for his best friend Sara's stalker issue, Joe decided to escort her home. However, as soon as they reached her house, they were attacked by someone and lost consciousness. When next Sara and Joe wake up, they find themselves in a strange facility. There, they find strange similarly kidnapped people. Including Joe and Sara, the 11 people-- despite being driven by suspicion-- cooperate, encourage each other, and become friends. While Joe protects Sara, he believes in everyone else and resolves to escape the facility. And yet, what awaited him was a Death Game where "Someone's death will be decided by everyone else."

(Source: Kadokawa, translated)