The number of side missions in "Double Shadows" is very large, and the side mission of the game show is one of them. If you want to do this side mission, you can go to the devastating moving tree trunk of Spring Hope in Chapter 3. After crossing the Long Wood Bridge, the main line is on the front right and the entrance of the side line is on the front left.
Where to do the branch line of the Double Shadow Wonderland game show?
Game Show
Position: Chapter 3 Hope of Spring Devastating Moving Tree Trunks
After passing the long wooden bridge, the main line is on the front right and the entrance to the branch line is on the front left.