Please note that if you don't purchase this, the price will be reverted tomorrow. These are leftovers from a previous purchase at KUMON SHOP (official online shop). There are 9 sets on one side and 2 sets on the other, for a total of 11 sets. The items themselves are new, but please be aware that the bags have been opened. I would appreciate it if someone could purchase them all together. Silent purchase and immediate purchase are welcome! *Due to potential bad weather or consecutive holidays, I've set the maximum shipping time. I usually ship within 1-2 days, but if you're in a hurry, please contact me before purchasing. Thank you for looking.