On a drizzley morning, Miss Monochrome wakes up in her four and a half tatami-mat sized apartment. When she tries to change her battery, a leak in her roof causes her battery box to explode. What should appear from the smoke of the explosion but a good-looking guy in the form of a battery! Miss Monochrome and Battery-kun are shocked by this destined encounter. Thus begins their days of friendship.
Let's set out on an adventure 
around the world!
لنذهب في مُغامرةٍ عبرَ أرجاء الأرض ابتداءً من الآن
Lass uns eine Abenteuerreise machen!
¡Viajemos por todo el mundo 
para tener una aventura!
¡Viajemos por todo el mundo 
para tener una aventura!
Partons à l’aventure
autour du monde !
Partiamo per un'avventura in giro per il mondo!
Vamos partir a uma aventura
 ao redor do mundo!