My Melody is hosting a Mystery Train dinner, and everyone is getting into character. Hello Kitty, Keroppi, Cinnamoroll, Pompompurin, Badtz-maru, Chococat and Kuromi are all suspects in the mystery of the missing cupcakes and secret recipe. But who is really to blame for this mystery? Watch and find out!

Pompompurin, Batz-maru and Keroppi are on a road trip that comes to a complete halt when the truck breaks down. With no cell phone signal, the boys find themselves lost. Will they ever find their way back home? Hopefully X marks the spot as they try to navigate their way back home.