the day you create your own illusions and name it world is the day our friendship crashes. Personal fantasies leave no room for the reality of another's personality so just be honest with yourself and I. We'll do just fine
This is the overview of Mushishi on Wikipedia. The story features ubiquitous creatures called Mushi that often display supernatural powers. Mushi are described as beings in touch with the essence of life, far more basic and pure than normal living things. Due to their ethereal nature most humans are incapable of perceiving Mushi and are oblivious to their existence, but there are a few who possess the ability to see and interact with Mushi.
One such person is Ginko (ギンコ?), the main character of the series. He employs himself as a Mushi master (蟲師, mushi-shi?), traveling from place to place to research Mushi and aid people suffering from problems caused by them. The series is an episodic anthology in which the only common elements among episodes are Ginko and the various types of Mushi. There is no over-arching plotline.