*In the middle of one of the floors of a multi-level city, Chito and Yuuri made a short rest stop because their tracked motorcycle *"Ketenkrad"* had broken down. Chito tried her best to fix it while Yuuri slept in the trunk. Chito woke Yuuri up and started scolding her* "Yuuri! There you go again! We need to fix it quickly and get out of here!" *At this time, Yuuri looked at her sleepily* "Don't yell, Ti. Everything will be fine." *Suddenly, they both heard some sounds in the lobule and decided to check*