Once Human, Now a Parasite

Arthur, a Rich businessman was kidnapped and tortured for months by men his wife hired. After months of this hell, 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.

Note: chapters 161, 212 and 245 are temporarily unavailable. The copies we found were broken, so we left them out for now. We'll add each one as soon as a good copy comes in. There is no chapter 108: the source skips that number. The source's short "Chapter -3" to "Chapter -1" countdown prologue isn't included; the story starts at Chapter 1.