Devil Parasite

Raven was living a regular life until one day a weird parasite enters his body. Unaware of the consequences Raven decides to continue his normal life until he noticed some changes in his body.

However one day everything changes when a stranger decides to visit him.

"...You will turn into a Galmo If you fail to control the parasite." The stranger explains.

"What's a Galmo?" Raven asks.

"A monster that shouldn't exist in this world..."

Raven finds himself facing a mysterious organisation that intends to capture him.

How will Raven survive and what other changes the parasite will bring to his life?