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.
This was how Monochrome and 
Battery-kun's days of friendship began.
هكذا بدأتْ أيَّام صداقة مونوكروم وبطّارية-كون
Und so begannen die Tage der Freundschaft
zwischen Monochrome und Battery-kun
Así empezó la amistad entre 
Monochrome y Batería-kun.
Así empezó la amistad entre 
Monochrome y Batería-kun.
c’est à cet instant
que naquit l’amitié
Fu così che ebbe inizio l'amicizia
 tra Monochrome ed EnerGino.
Foi assim que os dias de amizade entre
 Monocromática e Pilhado começaram.