A Big Discovery While Hiking Deco!.Ruby remembered something about what she saw during the time when the tornado blew Deco Stone away. The group decides to find out further as they a hike in the mountains. Later on, everyone are inside the Decobus, discussing about the hiking. Just then, Ruby's Jewel Pod starts to ring and then answered the call, revealing a strange human female contacting them. KiraDeco 5 recognized her as Professor Decorski, their boss and the one who updated the Kira Deco 5's equipment. Ruby, Garnet and Sapphie encounters it using their Jewel Magic.