Der 14-jährige Yuuichi redet nicht viel. Er chattet lieber. Allen voran mit Anhängern der traurig-verträumten Musik von Lily Chou-Chou, durch die er der grausamen Realität seines Schulalltags zu entfliehen versucht.

In the year 199X, on the dark, shady streets of New Kabuki Town, the free-for-all between gangs of young delinquents and a corrupt police force is further complicated by the appearance of a mysterious girl named Asuka.

It is 1980. Sadatomo is at a secondary school in a small town. His parents barely take any notice of him. The strict teacher Kobayashi has hung up a 'humanity index' in the classroom, divided into the categories 'delinquents', 'scum' and 'people'. In each category he has hung name-cards of pupils. One day Kobayashi finds out that Sadatomo and his friends have stolen some things from a shop for fun. Their fathers are informed and as punishment, the children have to write a 'self-critical' essay of no less than thirty pages. For the first time, Sadatomo is beaten by his father. Shocked, he writes a piece entitled 'I am an onion', in which the teacher thinks he can detect a first sign of humanity. That is the start of a confusing situation in which it gets hard to distinguish lies, truth, justified self-criticism and opportunist wheeler dealing, even for the boys.