17 year old Saki lives in a run-down shack with her mom, who survives by pushing a food cart from dawn to dusk. Saki has dropped out of school, and when she's not helping her mother selling noodles in the streets, she's playing flesh-games with boyfriend Sotoo. In her spare time, the girl also entertains a truck driver named Ataru. She believes her promiscuity is a trait inherited from her mom. Determined to improve her lot in life, Saki decides to stop seeing the two guys.

An assassin trained as a ninja carries the code name M. Hayami is a yakuza boss and a divorced father who is not allowed to come near his young daughter Mutsumi from his ex-wife Kazuko. In the big port city of Yokohama, M targets Hayami, who has angered the president of his group.

A working class young man, Tetsuo, who distrusts all rich people, falls in love with a girl, Chika, from an affluent family. He has a difficult time, but love survives despite the problems.