Kato is an up-and-coming scriptwriter in the middle of a severe slump. He submits ideas for potential movies but makes no headway whatsoever, and spends his days downhearted and distressed. When he heads out to buy “Dog Man,” food for his lover’s beloved pooch Cerberus, one thing leads to another and he stumbles into “Ideal Mart,” a convenience store where he can find everything his heart desires. There, he encounters a mysterious married woman named Keiko, who gets his creative juices flowing again, but…