Hina Satou is a 13-year-old who loves figure skating and lives in a port town in Miyagi Prefecture. After losing her mother in the 2011 earthquake, she and her father are currently living in temporary housing. With sad memories of the earthquake and memories of a gentle mother, the cheerful Hina continues to move toward her dreams.

The CLAMP school, with its integrated curriculum from kindergarten to post-graduate studies, was founded by the largest of Japanese business empires, the House of Imonoyama. Funded entirely out of its own deep pockets, it was hoped that the school would be a haven for young men and women on whose shoulders our future would rest. The School is open to any talented individual, irrespective of his or her lineage or financial standing and is known to count scores of singularly talented pupils. It is furthermore also famous for its harboring of a remarkable percentage of party animals. Not even the bright and talented minds of CLAMP School can keep the campus free of crimes and mysteries. Or can they? Join Nokoru, Suoh and Akira, our case-cracking kid detectives, as they save the day and even the odd damsel in distress!

Yurume, an 18-year-old "ronin" and recent high school graduate, has high hopes of being accepted and attending Tokyo University. She moves into an apartment complex, the Maison du Wish, located on the outskirts of Tokyo where other ronins living there are studying for upcoming college acceptance exams.

The age of the demons has begun. Dr Faust has foreseen this rise of evil. Unfortunately, he is near death and is unable to personally battle this upcoming threat. Faust entrusts a young boy, Shingo Yamada, to take the responsibility of ridding the Earth of this new evil presence. Faust finds a birthmark on Shingo's forehead that signifies that he is the chosen demon fighter. Faust summons from hell what may be humanity's only hope of surviving: a less than enthusiastic devil named Mephisto rises. After signing a pact in blood to save humankind, Shingo and Mephisto set out to battle the supernatural world.