In the XXXX SY[space year]. Many human unlocked a part of their brain and many Psychic or ESP[extra sensory perception] user were born. And among all those who unlocked their power a single man were feared by all and given a nickname NIGHTMARE. He has the power to destroy a whole planet alone. Many Esp combined their forces to kill him but no one returned. But one day he were killed, he didn't know who nor how. With his hovering consciousness he found himself in a white world with single beautiful lady sitting at the center. The lady measured his sins and deemed him guilty for many things so as compensation for all of this he was reincarnated to a weak being to feel how people beneath him feels.