A suspicious shadow is trying to break into the office.
After determining the identity of the shadow, Javelin and friends end up cleaning the office along with Mikasa-daisenpai.
And what's this behind the shelf, something highly classified?
Because the manjuus get bored 
with cleaning too quickly.
.لأنّ المانجو يشعرون بالضجر بسرعة أثناء التنظيف
Die Manjuu langweilen sich
beim Putzen zu schnell.
Ellos se aburren muy rápido de limpiar.
Se aburren enseguida de limpiar.
Oui, mais ils s’en lassent très vite.
I manjuu si annoiano subito a fare le pulizie.
Eles ficam entediados
rapidinho na limpeza.
Им неинтересно,
когда всё быстро заканчивается.