Paradigm Parasite

The protagonist, despairing of his life and taking his own life, finds himself in a strange place, looking like an earthworm. His body has the ability to attach to and manipulate corpses, and with this power he succeeds in taking possession of the body of a dead young man. This is a story about a young man who travels through a strange world on his own with the body of a dead young man, a little bewildered by his changed self. It is supposed to… — Description from novelcodex.org