At Binan High School in the city of Binan, Japan, Yufuin En and Kinugawa Atsushi, along with along with Naruko Io and Zaou Ryuu, enjoy leisurely high school lives while hosting meetings of a do-nothing club called the Earth Defense Club.
You boys are the Battle Lovers 
who protect the Earth!
Ihr Jungs seid die Battle Lovers,
die die Erde beschützen!
¡Ustedes son los Battle Lovers 
que protegerán la Tierra!
¡Vosotros sois los Battle Lovers 
que protegerán la Tierra!
Vous êtes les défenseurs de la Terre,
les Battle Lovers !
Voi siete i Battle Lovers che proteggono la Terra!
Vocês são os Battle Lovers 
que protegem a Terra!