LBX: Little Battlers Experience   Vol. 1,2,3 Manga ( Books) 
PERFECT SQUARE
(W/A/CA) Hideaki Fujii
To save his father, who is being held hostage by the nefarious Cillian Kaido, Van must win the Artemis Tournament to secure the main prize - the only thing Cillian will take in trade for his dad. But his next opponent in the arena is a fierce one...Cillian's grandson, Justin Kaido!

For all ages.