The “San-chan-ku!” POP-UP SHOP is set to open at seven GRA Select / GRANUP company-owned stores starting October 23, 2026! New merchandise, such as acrylic stands and pin badges featuring newly drawn illustrations, will be available, and a purchase bonus will be offered: for every 2,200 yen (tax included) spent in a single transaction, customers will receive a random postcard (8 varieties total).