Rats Roam All over the World

A programmer dies suddenly while working overtime and wakes up as a house rat with a trace of the blood of the God-Eating Rat! Join the system and travel across the heavens! Practice with one click and upgrade in seconds! This is the story of a lazy mouse enjoying his life! The best in the world, Ancient Sword Tales, Fairy Swords and Fairy Tales, Sweet Honey as Ashes as Frost, Fighting to Break the Sky, Flowers of Thousand Bones, Killing Immortals, Covering the Sky, God's Tomb, Coiling Dragon, Devouring the Starry Sky...