This is a long shot since I don't remember much but-
It was an action/supernatural type of manga. A high school boy, I think he got attacked by this thing with lots of teeth at his school. I think remember something at the beginning of a shack underneath a bridge.
But, due to the attack he started becoming a monster too but was working on fighting it, so he had to leave with this group of people to learn how to handle it.
I read it a good 10 years or so ago, and it wasn't complete at the time. A good couple of chapters, at least.
This is a long shot since I don't remember much but-
It was an action/supernatural type of manga. A high school boy, I think he got attacked by this thing with lots of teeth at his school. I think remember something at the beginning of a shack underneath a bridge.
But, due to the attack he started becoming a monster too but was working on fighting it, so he had to leave with this group of people to learn how to handle it.
I read it a good 10 years or so ago, and it wasn't complete at the time. A good couple of chapters, at least.