Ethen Cole travels to an era where everyone battles with pets. In a world revived by spiritual energy, danger and madness run rampant. Humanity relies on battle pet masters to establish bases and unite for survival.

Before the college entrance examination, Ethen Cole is framed and expelled from school, losing his chance to study at the Battle Pet Academy. Just as he feels despair, the Battle Pet System for battle pets activates.

“Ding! The Blue Riolux has evolved into a Emerald eyed Riolux!”  

From then on, Ethen Cole begins his legendary career as a battle pet master.