In order to find out the criminal who killed his lover, Kai shows up in the town that the two groups, Saruto and Maina, are ruling. There he manages to get close and become the bodyguard of “Steel Ratri”, a man who has the same ring as Kai’s lover, on his hands, but… (Source: Countless Time)

From CMX:
"Chaos" is a trading card game that is very popular at Manami's school. Trying to learn more about it herself, she purchases a beginner's set, only to discover that it contains "Sahgan, The Mighty Sorcerer," the rarest card in the game. Now every other player is out to win the card from her. But Sahgan himself begins to visit Manami in her dreams, offering her advice on how to win.