The war over new lands tired people out. That's when governments decided to follow a new plan. They called it "II Cold War" but instead of trying to suppress enemies with weapons and technology, the involved parties were to use humans; the strongest, the most intelligent and the bravest. Now, Japan needs to find people who are able to win every challenge given by representatives of fighting countries. The prize for the win: control over new territories.

Five guys, one house, one woman, one child and one shocking mystery… Kamenashi Kazuya, Taguchi Junnosuke, Tanaka Koki, Ueda Tatsuya and Nakamaru Yuichi are just ordinary men living together in the huge mansion. None of them has had a girlfriend so when a strange woman appears on their doorstep with a seven year old girl, they find it disturbing. But what shocks them the most is a sudden announcement that one of them is… the child’s father! Who’s the real father? How is it possible that any of