Muso is an RPG where you take control of a young High School Freshman, named "Atabi" on his journey to discover the secrets of the universe with the help of his childhood friend "Markus", a detective named "Casey," and a rebellious teenage rabbit named "Nuttallii."

Venturing through mysterious worlds created by a mysterious group of antagonists known as, "The Mauve," Atabi and his friends must unlock their true potentials and go through the task of understanding the true intentions of one-another in their misfit group in order to restore balance to the world and merge split realities caused by an unknown force in order to take over the world.