I'ma be real with you I only watched this movie because it has the word 'rat' in the title.
The world is terminally ill. A city consumed by wires and electromagnetic waves. High school rooftops and bodies soaring through the air. Summer heat and wide blue skies. Spontaneous homicides and schizophrenic delusions.
August in the Water is one of the strongest example of denpa-kei fiction I have come across and I regret not watching it sooner.