When his father flees from debt, carefree college student Osamu sees his life turn upside-down. Expelled from school and evicted from his apartment, he becomes one of Japan’s many ‘net cafe refugees’, barely scraping by each day with temporary and part-time work. Even though he’s still in Tokyo, his circumstances drive him to see and experience his home city in new ways. Trying to survive, Osamu gradually acquaints himself with the ‘invisible’ spaces occupied by the wanderers and homeless of Tokyo… people just like himself.

Dvorak's Symphony No. 9, "From the New World" wafts through a hospice recreation room. Sitting at the grand piano is a young girl, Chiori, with a prodigious ability to play any piece of music after one hearing. Keisuke Kisaragi whose career was abruptly cut short when he jumped in front of a bullet fired by a crazed gunman. The nerves in one hand were severed but he saved the life of Chiori. The tragic incident takes the lives of Chiori's parents, however, and Keisuke becomes her guardian. Not long after their return to Japan, Keisuke discovers Chiori's musical gift.

Struggling high schooler Miyui Mashio is transported back to 1991, where she attends school with her quarreling parents—realizing she must form an idol group with her mother to help her parents fall in love, or risk never being born.

Kaori is pursuing her career as a journalist for a magazine with great enthusiasm. But as a result of an article she wrote, she is sent to work for a community magazine at Fukuoka. An anonymous letter arrives, which puts her in contact with an old and forgotten theater, the 'Minato Theater' in nearby Shimonoseki.

The movie was inspired by Hiroshima prefectural government's marital activity "Koinowa Project" which is practiced as part of countermeasures against the declining birthplace.