From here, it is hard to piece together just how events in the film unfold the way they do.
The violence in the movie is a bit excessive, but this is not what the film is about. The violence is done in a way that seems realistic and not glorified. Every act is abrupt and unexpected, much like real life violence. In between the scenes of brutality the camera settles on art and nature, which gives a dual perspective on the film as a whole. The most blatenly opposing image shot in the film is when Nishi's partner is shot and is struggling on the ground, all the while pink roses are in the shot. The film also effectively uses juxtaposition between shots, making an impact on the viewer.
Aftern the scene where Nishi stabs the gangster in the eye, there is a cut to a shot of the sea and children playing. The movie shows us both sides of humanity and nature with various juxtapositions like this one. The film freqently cuts from scenes of violence to a shot of nature or an artwork, or vice versa. This is tied directly with the title and theme of opposing forces in the film. There are also many shots of art in the film, which convey a presence of Nishi's partner.
slkjfdokasjdf;lk has been paralyzed while on duty, and is forced to rethink his life, and in the meantime takes up painting. He creates various works throughout the film, while Nishi is hunting and killing the gangsters who shot his partner. The mixing of lsdfo's artwork with the violence surrounding Nishi is an important point of the movie. While Nishi must kill and destroy to achieve a certain closure, sdlfkj must paint and create to achieve this. If you compare this to the title of the film, Nishi could be fire and lasdkjflas could be flower. The fire symbolizes destruction while the flower sybolizes growth. sldkjf sits in his wheelchair and observes nature and contemplates while Nischi seeks out and kills the people who shot his partner.