Jaja-uma Quartet

, or Wild Cardz in the Eglish Dub, is a Japanese media-mix project by Studio OX. The manga created by Noritaka Suzuki was serialized by Magazine MEGU (by BiBLOS Co.,Ltd) and Monthly Out (by Minor Shobo)

A Japanese PlayStation game titled Jaja-uma Quartet Mega Dream Destruction+ was developed by GMF on September 10, 1998.

A two-episode OVA anime produced by Studio OX, Movic and BMG Victor Japan was released in 1997, directed by Yasuchika Nagaoka. It has been released in North America by Central Park Media.

Plot
The Card Kingdom is a prominent land that is taken over by invaders and it is up to the Crown Knights to push back the invaders and protect their land with all their might.