JaJaUma! Quartette

Japanese Title: じゃじゃ馬カルテット

English Title: Wild Cardz / Crown Knights

Plot
The Card Kingdom is a prominent land that is taken over by invaders and it's up to the Crown Knights to push back the invaders and protect their land with all their might. The Crown Knights are a bizarre special force to fight to the criminals who threaten the tranquil Card Kingdom. Each one had a special ability. But these Crown Knights must get down and dirty when they run up against two war machines shaped like gigantic chess pieces. The deck is stacked against them, somehow they've got the checkmate these indestructible invaders before the Card Kingdom topples.