In this normal world . A world without any fantasy , magic or superpowers . Unlike a normal person , I can see someone's life through dreams . Experiencing lives of people I never met , from kings , people from distant future , to even the poorest ones . In just one slumber , I fully experience what they went through from birth to death . An accident happened , I died and met the one who gave me the power . She said :" You will be reborn as one of the people in your dream , when you die , that process continue , it will stop when you have lived the life of all you had experience through sleep and when that's done ." "You will be reborn on Earth once again "