Rintaro Aida is a handsome teacher. One of his students, Sachiko Sakurai endures unpleasant situations everyday. The identity of the person who causes the unpleasantness is not known. ...

The top student at a prestigious prep school risks it all when he falls in love and boldly breaks the institution's strict "no relationships" rule.

Asuka Yukihira (Alice Hirose) is 28 and works at the reception desk for a music school. She hears that her high school will soon be abolished and decides to attend a school reunion held at her high school. There, Asuka Yukihira meets Haruto Mizuno. Asuka Yukihira liked Haruto Mizuno when they were high school students, but she never conveyed her feelings to him. Asuka Yukihira and Haruto Mizuno talk during the school reunion and they learn that they both had feelings for each other and they still feel the same way. Asuka Yukihira is ecstatic, but, the next day, an unexpected tragedy strikes Haruto Mizuno. That leaves him in an unconscious state.

Kazuha Ono is divorced at the age of 35 due to her husband's affair. Despite this, she is trying to live positively but is conscious of other people’s remarks regarding her age and the fact she’s a divorcee. While announcing her divorce to her coworkers she is overhead by Mitsui, a new employee, who happens to be there. Furthermore, Rensuke Hayami, a former business partner, now a popular actor, also appears, and begins to wield her Kazuha?!

"Goodbye" is something that could happen to anyone tomorrow. And the feelings that remain afterwards. Through the serious subject of "forensic medicine," it carefully captures the feelings of love for others and the time they lived, quietly shedding light on the darkness of a "society where the cause of death is unknown".