Youji, Kei, Kelly, and their bear-shaped robot companion, Oscar, must come together to rescue their hometown from the perilous threat that looms over it. Meanwhile, Youji remains unenthusiastic about his birthday celebration, despite the efforts of Kei, Kelly, and their caregiver, Anna. Little do they know, an uncontrollable sightseeing airship is approaching the town, presenting our tiny heroes with their greatest challenge yet. To make matters worse, they encounter the advanced Fastening Machine! Will they be able to save their town's future, and what about Youji's birthday? To find out, audiences must watch the action-packed drama unfold before their eyes!