Wild Cardz.

Jaja馬!カルテット

Wild Cardz, known in Japan as Jaja-uma Quartet (Jaja馬!カルテット), is a Japanese manga series written by Noritaka Suzuki. It was adapted into a two-episode original video animation (OVA) anime in 1997, directed by Yasuchika Nagaoka. It was released in Japan by Studio OX, Movic and BMG Victor Japan.