Upon reaching the train station to death, a dejected soul is informed that he is "lucky" and will have another chance at life. He is placed in the body of a 14-year-old boy named Makoto Kobayashi, who has just committed suicide.
A soul, homestays in the body of a deceased high school student. While reincarnated, it must find the student's death cause. Limited to 100 days, a glimmer of light and large darkness intersect in the truth.