Pink Baby raised her slender arm before me as she glided her fingers across the pictures on the wall. As she walked forward, her finger directed my attention from one picture to another. Now, more than half of the people who had been in the first picture were gone. There was only a middle-aged man left at the entrance of the theme park with a few male and female workers.

The middle-aged man should be the owner of the theme park. He appeared in the middle of every single picture along the corridor. As we walked further, he looked older and older through the pictures. Pink Baby’s finger drew an invisible timeline, along which the people in the theme park constantly changed.

“This was during...