Year-end! Grandma's Big Cleanup, deshuwa!

Synopsis

To close out the year, Avocado Academy is doing a big cleanup. «Leave the cleaning to me», says the entire Ōkanda family, gathering en masse to fire up the students. Yui and the others throw themselves into cleaning and, in the middle of it, find some old sunglasses. It seems these sunglasses are a key item to solving the Falulu and Garara problem...