Mazoku and Magical Girls in the Modern World!?

In the face of a seemingly endless war, seven Magical Girls devise a plot to overthrow the Overlord of the Mazoku. Met with failure, they are devoured by their own magic. Hundreds of years later, little has changed. In the skies of the world of the Mazoku, called Makai, another fateful clash rings out. FUNANO RIHO, Magical Girl, and SORANE KIKYO, a Mazoku. However, their battle is cut short when one of Riho's attacks hits a totem carried by Kikyo. In a brilliant flash of light she finds herself on a crowded asphalt street, with her adversary no where in sight. Meanwhile, Kikyo finds herself in an apartment complex nearby. The fate of two worlds hangs in the balance, unbeknownst to either.