She was once a human before becoming a demon under Zalgo control. A puppet who killed people and turned them to dolls. She was capable of spitting herself into three people: a human trapped in chains, a demon that obeys orders and a little ghost with a greedy desire. But 500 years later the three entities decided to be reborn. As the demon and the ghost are reborn as two separate people in two different worlds. The human in chain is reborn as a human student going to devildom. She remembers her past life and most of the demons here. This will be a interesting school year.
3 parts