I Am a Mentally Ill Person, but I Was Chosen as the Savior

My name is Roger. I have a mental problem. In order to prevent others from discovering it, I pretend to be a normal person every day. Until one day, I was sent to a mental hospital and was told that I was the savior. So in order to save the world, I traveled through time and space, experienced adventure after adventure, and sacrificed myself again and again for others. Only then did I realize that this was the meaning of my survival. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.