Title: Liar Game
Mangaka: KAITANI Shinobu
Genre: Drama, Mystery, Psychological, and Seinen
Summary From Null:
Congratulations! You are one of the 1 in 100,000 people who has been entered in the amazing LIAR GAME TOURNAMENT!

Along with the postcard there are 100 million yen in notes. That's the beginning of the Liar Game. When the game ends, in 30 days, you will have to return your 100 million. If your opponent steals them, he can keep them as a prize, and you will have a debt of 100 million...

My Opinion:
It's an awesome manga the only thing that I hate is how Nao is so stupid and always needs Akiyama to help her -.-... Oh well that's just me.