>>529953162
>>529898763
>>529915204
For those who don't get the axe thing, it's a reference to one of Aesop's fables:
https://en.wikipedia.org/wiki/The_Honest_Woodcutter

Ume's "The Rolling Riceball" is also a reference to a similar folk tale about an old man who drops a riceball which rolls down a hill and into a mouse's hole:
https://journeys.dartmouth.edu/folklorearchive/2016/11/18/omusubi-kororin-rolling-riceball/
This is why the animated MV for The Rolling Riceball features Ume rolling down a hill and ending up underground with mice:
https://www.youtube.com/watch?v=FL-NhmFGQYw