About Me and My Substitute

The protagonist suddenly goes back in time when he witnesses a murder. When he wakes up from home, he finds that he has gone back to a year ago. A strange change has occurred in his body. He has an ability. He calls it a Substitute and begins to investigate the incident. . . . . . . . . . . . . . . . . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.