Nao Kanzaki is an ordinary student well-known for his honesty. One day, she received a strange package containing one hundred million yen, and unknowingly, she became part of the dangerous Liar Game. The players must betray each other to win money, while losers have to pay their massive debt. Nao has no skill in manipulating or lying to others, so she seeks help. Shinichi Akiyama, who is a con artist, decided to help her. Together, they navigate the manipulative world of games.