Kazuma Akazawa

Kazuma Akazawa, is the older brother of Izumi Akazawa and an ex-student at Yomiyama North Middle School in 1996. He never appeared in the anime.

Personality
He is mentally unstable and he often locked himself in his room, hitting and banging the wall.

Plot
Kazuma appears in the manga chapter 12, he is shown hitting the wall with his fist, creating loud noises. In chapter 14, he sneaks out his room to get some food and broke the plate instead. This alert Izumi and she walk out the room to check on him. As soon as he saw Izumi, he murmured Izumi's name and fleed back his room, continued creating noises. Later in chapter 17, he commit suicide by hanging himself in his room. In the anime, one of the class list of 1996 has Kazuma's name on it and this could indicates that Kazuma is dead in the anime. In Episode 10, Izumi is seen crying for him at the start. In Episode 12 it is revealed that he died a year and half ago, prior to the the time when Izumi met Kouichi.

Trivia

 * His home address is 1-1 Akatsukicho Yomiyama City.
 * There has been a lot of suspicion that he was the one who killed Reiko Mikami in the anime. However, it is unknown if this is true or not.
 * His first name, Kazuma, means true harmony.