Kubo has to suppress laughter when he leaves gyoza for the woman who roams the vents, who's reputed to gift children with Useful Knowledge in exchange for conveniently placed food. It's just such a charming idea, the seed of a story.

This afternoon, upon setting his offering at the vent, he remains to play a little song for the woman in the vents, who may or may not appreciate music. He has no way of knowing yet.