Kanae Minato

A psychological thriller of a grieving mother turned cold-blooded avenger with a twisty master plan to pay back those who were responsible for her daughter's death. (imdb)

Yuji Akahoshi works for a television show. He receives a call from an old high school friend, Risako. She tells him that her co-worker at a cosmetics company was stabbed to death and then doused in flames. Yuji decides to interview workers at the company and others that knew the victim, Noriko Miki, for his TV show. Yuji soon discovers that another co-worker, Miki Shirono, disappeared the same night of the murder. Yuji attempts to unravel the mystery of Miki Shirono. (asianwiki.com)

20 years ago, an elementary school student falls on an island in the northern tip of Hokkaido. A teacher and 6 students makes contact through songs. What happened to the student who fell? The teacher returns 20 years later to meet with her former students. (imdb)

A young girl, Emili, is killed by a stranger in elementary school. Although her four friends saw the suspect, they say they don't remember it. 15 years have passed and the incident is still unsolved. Emili's mother, Asako (Kyoko Koizumi), makes them do penance for it. The series focuses on the psychological repercussions on each of the four girls, 15 years later. (wikipedia)

Two melancholic high school students struggle to find meaning in their lives.