Ten is a friendly guy who happens to be good at Mahjong. Or, more appropriately, good at cheating at Mahjong. If someone is betting on a Mahjong game and ends up in a pinch, they call Ten to win for them. He always does, and because he understands how frustrating it is, always has the courtesy to give the people he cheats against a chance to beat him up. With his friends Hiroyuki, Ken, Akagi, and others, he eventually decides to take on something much bigger than cheating in small gambles.