They are neither plants nor animals. They differ from other forms of life such as the micro-organisms and the fungi. Instead they resemble the primeval body of life and are generally known as "Mushi". Their existence and appearance are unknown to many and only a limited number of humans are aware of them. Ginko is a "Mushi-shi" who travels around to investigate and find out more about the "Mushi". In the process, he also lends a helping hand to people who face problems with supernatural occurances which may be related to the "Mushi".
Overall, i enjoy the story. The drawing is simple but the story is unique, each chapter is on it own on how the Mushi help other people and about Myths and legend etc. :)It will be nice if there is another season to pickup the last season :)