Held annually in early April. The main event is the "Mucha-sales Festival," in which each store sells Osu-like products, and other fun events are held each year.

Live YouTube broadcast will be held at the 10th Unreasonable Sales Festival. (April 2, 2022)
The shop staff appeared and introduced the proud unreasonable products!
You can enjoy recording on YouTube.
https://www.youtube.com/playlist?list=PLrfn9FVd00vZnAGnTv5GIMlWCSIAhe7y9