I wake up to find myself.... Trapped in a locker?? I'm the Ultimate Liar, not the best talent but it does has its perks. Seventeen students trapped and forced to play a killing game made by a black and white bear. You find another liar like yourself among the seventeen students. As the Ultimate Liar lying is no problem, but what happens if you're forced to say the truth? What happens if they want the truth? And most importantly, what happens if he finds the truth?

You are going to the Death Weapon Meister Academy,with your partner,Saitteki Usatara. But when you first stepped on your favorite school,a blue haired boy whom you call "Mr. Monkey" challenged you to a duel. Little did you know,your life will change in that single fight. Your darkest secret will come out. And you know what's worse ? It'll be figured out by someone you fell in love with.