Comet Robo is home to robots that can make anything, and the robot girl Roboly is always the best at whatever she does. Then she learns there is a single "important thing" that even she cannot make, so she leaves Comet Robo to go find it. On the way, Roboly and her partner Koto, a little robot bird, pick up a gift box holding a lovely music box and travel to Anpanman's world to track down its owner. Spending time with Anpanman, she notices a warmth in her chest that she cannot explain, and while she wonders about these first feelings, her bond with Anpanman and his friends grows deeper. Meanwhile, Baikinman invents Roboking, the strongest mecha, and goes on a rampage across Comet Robo. The question is whether Anpanman and his friends can protect Comet Robo. The 2023 film blends comedy and fantasy.