Death Trinity

It was a different world with different lands, seas, and countries. In this world existed demons which seemed to corrupt the world, however, they were only in their spiritual form. Demons made contracts with humans, then with the contract with demons, the humans' lives were made better. However, with the help of demons, those humans obtained power that was not supposed to be in the hands of mere mortals, and due to that, occasional disasters and chaos occur.

In this world, there was a young man. In that body of that one man contains three personalities, three different minds and thoughts, and three souls, all in that one body.  Due to what happened to one of the people he, or rather, they loved, they made a contract with neither demons nor angels. They made a deal with Death.

The three personalities -- The Great Pretender, The Confident Genius, The Bringer of Death -- sought to rid the world of the ones who were causing disasters.