Based on the manga series of the same name, an honest college student, Kanzaki Nao, receives a hundred million yen one day, along with a card saying she has been chosen to take part in the "Liar Game". The aim of the game is to trick the other players. Police who can't do anything drives her to a mastermind swindler, Akiyama Shinichi, who is being released from jail the next day. Desperate, she goes to him for help.
(Summarized from DramaWiki)

Picture	Actor	Role	Description
	Toda Erika	Kanzaki Nao	Nao is known for her honesty that makes people know her as "Nao the idiotically honest girl". She get caught in pitfalls for 42 times, fallen to deceivingly rendezvous that made her waited excitingly for more than 5 hours, and almost fell for phone fraud from a person claimed as her yonger brother by forgetting that she is a single child. Though people like to make fun of her, she doesn't bothered about it, because she believes that it is important to be honest. But someday, her honesty drives her into a such scary game, called "Liar Game", which is arranged by LGT organization. Strangely, a police officer told her to use a genius swindler "Akiyama Shinichi" to win her game.
	Matsuda Shota	Akiyama Shinichi	A genius swindler who had been caught 3 years ago and just been released from prison because of his fraud action that made a multinational organization went to bankruptcy. He did this criminal to avenge his mother dead that was caused by this organization. Before becoming a swindler he was an average psychology university student who had lost his father when he was small and raised by his mother. At the beginning instead of helping Nao he tries to trick her by making her wait in a certain place for long time. But her honesty reminds him to his late mother that makes him decides to help her win the game.