第二の試験に合格しアトリエに戻ったココたち。平穏に戻ったアトリエにカルンで出会った少年・タータが、魔法使いの祭り「銀夜祭」への出店を手伝ってほしいと頼みにやってきます。生徒たちは全員で銀夜祭に向けて準備をはじめますが、その中でタータと行動を共にすることになったココは、タータの友人である足の不自由な少年・クスタスと再会します。

After finding success together in their second trials, Coco and her friends return to the warmth of the atelier. Before long, they are approached by Tartah from Kalhn, and he needs their help setting up shop at the thrilling witches’ festival, Silver Eve! But to design a contraption to sell there, the young students must consider the power of magic-at once delightful, beneficial, and potentially harmful. As Coco makes prep arations alongside Tartah, she’s reunited with Custas, a boy who was saved by Coco once before, but is convinced that luck will never shine on him again…