Noticed another unlisted daily event.
The first time you enter the middle house on the east side of the Village Bridge, a girl will mention something about going to the Wonder Bridge, and will charge off, followed by her quartet of Minezumi.
After that, you can find her at the Wonder Bridge, where on a once a day basis, she'll let you play a simple minigame with her Minezumi, where you need to watch the Minezumi that hops at the start, then talk to it after they shuffle themselves around.
You get a Big Mushroom if you win, and you can retry the game until you win.