All Chou-Chou wants is to rule the world. Can’t an undisputed god get a break? Chou-Chou Infinite set out to conquer seven worlds because each of them have something unique and Chou-Chou wants everything. Chou-Chou, the lead character in Mugen Souls, has two special abilities – she can turn anyone who adores her into a servant and she can transform to match a different personality. Her "ditz" personality has a tendency to fall asleep and her "sadist" personality loves to torment Ryuto.
Ryuto (standing to Chou-Chou’s right) is her first vassal who dreams of traveling through the universe. He takes care of Chou-Chou’s ship. Altis is a clumsy demon who always did good deeds and was reborn as an angel. She travels with Chou-Chou and Ryuto.