Sun Baihe time and again traveled through time, searching for his way home. He had once teamed up with Asuna in Sword Art Online, their combined swordsmanship reaching the top of Aincrad; he had also used his 3D Maneuver Gear to slice through the nape of a giant's neck in the world of Attack on Titan; he had studied magic at the Clock Tower, only to be unexpectedly swept into a time warp, returning thousands of years to teach Artoria how to govern; he had shared drinks with Whitebeard, and later single-handedly conquered Mary Geoise, the holy land of the Celestial Dragons, ending their rule; he had debated swordsmanship with Retsu Unohana, experienced Sosuke Aizen's Kyoka Suigetsu, and dominated the world of Bleach, seemingly undefeated; he had even been slammed in the face by the White Tyrant, and became friends with her… After countless hardships, he returned to the main world, exhausted both physically and mentally, becoming a lazy bum who only wanted to rest for a few hundred years. But unexpectedly, the sixth wave of spiritual energy revival opened countless dimensional portals. Seeing familiar faces on the television screen, Sun Baihe shuddered. "Damn it, the debt collectors are here!"

Chen Mu traveled to the world of Star Dome Railway and became a glorious researcher in the space station. Just when he was about to become famous in the starry sky, a chat group suddenly invited him to join. Tokisaki Kurumi: "Immortality, teleportation, controlling the world, destroying stars... You tell me this is science?" Butterfly Kanae: "Um, is science the science I know... It's so terrifying?" Goto Ichiri: "Researcher... Are the requirements for being a researcher so high now? Shivering.jpg." Hoshino Ai: "Don't explain everything with science! This is not scientific at all, bastard!" Chen Mu looked at the group chat and sighed, thinking that everyone still had too little knowledge. Although it seemed a bit exaggerated to them, in fact, this is science. Believe in science.