Overworked office worker wakes as a fat capybara, activating the "Lazy Rest System". He is forced into a team by a white fox (Nine-Tailed Female Emperor), a crow (Heavenly Demon Venerable of Alchemy), and a honey badger (Boss). He adapts to beatings, evolves when injured. A 100 million High-Grade Spirit Stones bounty makes cultivation world chase "fat rat". The capybara just wants to Lay Flat.