Endless Masterpiece: the Girl Not Only Has a Gun but Also a Disease

The universe is heat dead and the stars are extinguished. In order to survive, civilization crazily stacked materials, creating this "corridor of eternity" that runs hundreds of light years. There are frozen stellar swimming pools, upside-down Gothic cities, and a wasteland of vending machines selling expired happiness. Sigma, a girl with a strange brain, carries a crappy radio and drives a pink sheep, rampaging through this endless giant structure. What others see as indescribable is the golden retriever next door to her; what others see as the doomsday wasteland is a resort in her eyes. Holding a crumpled complaint sheet in her hand, she vowed to find the "property management office" that caused the blackout in the universe. "Hey, that tentacle monster, give way, I'm going to file a complaint!"