The year is 2029. The world has become intensively information oriented and humans are well-connected to the network. Crime has developed into a sophisticated stage by hacking into the interactive network. To prevent this, Section 9 is formed. These are cyborgs with incredible strengths and abilities that can access any network on Earth.
Mima leaves the idol group CHAM, in order to pursue her dream as an actress. Mima climbs up the rocky road to success by performing as rape victims and posing nude for magazines, but is haunted by her reflections of the past.
The story centers on Kai, a gloomy middle school student whose life changes after meeting Lu, a mermaid.
Dai Miyamoto, a student from Sendai, receives a saxophone as a gift from his brother, Masayuki. He starts practicing immediately.
A janitor in Japan drives between jobs listening to rock music.