The Kisaragi Grand Park was first mentioned in Maps, Treasures, and Striker Sigma V when Hazuki lost her Fee cellphone strap. Later on, the mascot were also offered as a winning prize in the Treasure Hunt, organized by Fumizuki Academy.
After winning the grand premium ticket to Kisaragi Grand Park, Yuuji and Shouko went to the park together. There, Akihisa, Himeji and Minami went undercover by donning the Fee, Noin, Ein costumes.
Kisaragi Grand Park Mascot