In a world where human emotions have the capability to override your logical side and consume your mind whole, and in a world where beings called the "Soulless" eat human emotions, an organization of super-humans gather secretly to help maintain the balance of the world. After 15 years of its existence, a small group of high school students were recruited to become the new guardians of the unstable world. However, they have no idea of this recruitment and continue to live their life normally while the mysterious recruiters observe their habits and behavior to make sure they are qualified. They have no idea they were now contracted for life to this secret organization. And the organization did not expect any turmoil at the time, however, they thought wrong. An alarming number of human fell victim to these "Soulless" creatures, and it is up to the yet to be trained high school students to help protect human kind.... Difficult obstacles, lay ahead of these high school students and in what way can they adopt to this new change of lifestyle? Let's find out...