Akina Minami

At a certain house, a son brutally and methodically murders all five of his family members after failing the bar exam. He then hangs himself, leaving behind a cassette recorder at the scene on which he can be heard saying, "Go... Go now." in unison with a strange female voice. That voice belongs to a victim of the family massacre, the elementary school best friend of teenager Akane (Minami). When the two were young they wore yellow hats and red satchels to school. Akane, who has a strong sense of (bloody-disgusting.com)

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. Watched over by a neutral spirit named Purapura, the soul must figure out what his greatest sin and mistake in his former life was before his time limit in Makoto's body runs out. (Anime News Network)

In the 1980s, Ryotaro and the DenLiner gang save a boy when he is attacked by demons that came from the past. The demons want to change history using a supernatural stone which is a keepsake from the boy's mother.