Tokyo Mirage Sessions: The Official Companion Guide

In modern-day Tokyo, vile creatures known as Mirages roam the city to gather a form of energy called "Performa" from humans and has caused several disappearances already. The story revolves around the group of young men and women that have allied with non-hostile Mirages and became Mirage Masters to combat this threat. Working under the cover of the Fortuna Entertainment Talent Agency, these Mirage Masters fight in real-world locations or in twisted, alternate dimensions called Idolospheres where the enemy Mirages are hiding.