The music festival has begun, and the doors of the hall have been locked. The guests are given an hour to find a secret exit, and they will be rewarded for their efforts. The first couple to escape will be given the opportunity to choose a partner for the next round, and will receive a double reward. As the countdown begins, the sound of the stage fills the room with a "stage-noisy" noise. The sound reminds the audience that the music festival is a launch event, and not a secret passage. The music hall's plan is to hide the material package in the back of a card given to the guests before entering the concert hall. The only way to find the hidden package is to push the door open, but the door is locked and the only way out is by turning on the flashlight. The two of them can use the flashlight to light up the mosaic, but they are not allowed to do so because it is a child's device. They are afraid that the mosaic will get caught on the spot, and that they will have to thank each other in person.