The magazine "Cafe Guide" comes to "Cafe Lucky Cat", located on the first floor of the Butt Detective's office, for an interview, but the owner hurts his back, so Butt Detective takes over as owner for the day. The interview was going smoothly when a huge amount of sweet potatoes, eggs, fresh cream, and butter that the owner had mistakenly ordered arrived at the shop. Butt Detective and his team are surprised by the mountain of ingredients. In order not to waste the ingredients, Butt Detective decides to work with everyone in town to make a super-sized sweet potato.
DirectorSatoru Iriyoshi
WritersJun Narita, Troll

Part of
Includes: Butt Detective the Movie: The Curry Incident, Butt Detective the Movie: Mystery of the Ruins of Tentōmushi, Butt Detective the Movie: The Secret of Souffulé Island, Butt Detective the Movie: Shiriarty, Butt Detective the Movie: The Dream Jumbo Sweet Potato Cake Festival, Butt Detective the Movie: Farewell, Oh My Beloved Butty, Butt Detective the Movie: Star and Moon