Mamoru Miyamoto is a book editor and his friend Masao Muraoka is a writer. Muraoka hasn't released a novel since "Aki no Riyuu." Masao has suffered from mental health issues and, because of this, his voice fails. The two men talk through written notes. It seems Mamoru believes in Masao’s talent as a writer and waits for him to write a new novel, but he also likes Masao's wife Misaki. One day, Miku, who has read Masao’s last novel “Aki no Riyuu” several times, appears in front of him. She tells him that she is so similar to the heroine of the novel and can understand his mind.

Izumi Hoshi is senior in high school, but she led a small yakuza group in her past. After killing her uncle's murderer with a machine gun, her yakuza group disbanded. Izumi now lives an ordinary life as a high school student and works as a manager at a cafe. A dangerous situation soon awaits for Izumi.

A new primary school teacher struggles to deal with his new students and their over-protective parents. When he learns that one of his pupils is being abused, he decides to do something about it.

Prodded by a friend request, a feckless forty-something recalls his past relationships from the 90s onward, looking for his vanished hopes and dreams.