Once Human, Now a Parasite summary:
Arthur, a Rich businessman was kidnapped and tortured for months by men his wife hired. After months of this h.e.l.l, he was given a second chance, a new life in a different world and, of course, Arthur would rather start a new life than stay and continue to be tortured, so he accepted the deal that was proposed by a mysterious individual, but when he finally was reincarnated, Arthur discovered he was a….. parasite?
PS: Don’t expect a kind MC who saves everyone but don’t also expect a full anti-hero MC.
MC is a hypocrite, deal with it.