I Want to Live a Peaceful Life After Awakening as a Substitute

At the age of sixteen, I had just entered high school and was about to begin military training, but suddenly I had a high fever that had not gone away for 50 days. When I woke up, I found that I had awakened a substitute. It seemed that I would never be able to live peacefully in this life. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.