Nako isn't sure what exactly she's supposed to do here, but her time at Kissuiso has equipped her for cleaning... So that seems like a good place to start. And what place needs more cleaning than the flooding non-fiction section? Water is one of the few places she feels confident; she can totally handle this, right?

She just doesn't bet on the cleaning supplies fighting her every step of the way.

The buckets she's lugging to come catch rainwater strain in the other direction. "Come--on--!"

She's so absorbed in her struggle that she doesn't notice you until she nearly backs into you. Immediately she springs away, bowing her head. "I-I'm sorry!"