Is he human though? I have a feeling due to his stitches and the early scene of him crawling out of a fallen building, plus he doesn't remember having a past that he might be an experiment. Didn't the beginning say that there were some doctor's out there trying to achieve immortality from this "virus"??? Regardless, this is very well put together a d an emotional roller-coaster, deep character design and HOT HOT HOT. (▰˘◡˘▰)
The progression of the story line, character development, emotional and psychological impact this story has is phenomenal. Master piece. I've read it around 4 times now. You feel this one. Worth your time and heart.