Kuuhaku wo Mitashinasai

One night, Tsuchiya Tetsuo wakes up in a meeting room at work, and after returning home, his wife tells him, "You died three years ago." The cause of death was "suicide". The family was deeply traumatized by this.
However, since his son was born and his work had been going well, Tetsuo, who had no reason to commit suicide, suspected that he was murdered. Then, memories of the murderer emerge…
(Source: CDJapan)