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.
It's fine. As long as you'll be well.
لا عليكِ ما دمتِ بخير
Schon okay. So lange es dir gut geht ...
Si estás bien, soy feliz.
Si estás bien, soy feliz.
Ce qui compte le plus,
c’est que tu ailles bien.
Non preoccuparti. L'unica cosa 
che conta è che tu stia bene.
Não tem problema.
 Importa que você esteja bem.