Living with Succubus Compilation Vol.1 - Vol.4

The description says there is extra new content in this compilation. Is it possible to just sell the extra separately for a discount? I already bought the four volumes individually, and would rather not spend $20 to rebuy what I already have.

That content is released by Irodori so you would have to contact them about it.

yeah kinda a dick move. asked irodori last year or so about the "tth" chapters as sasamori called them in japanese, and they said they'd release them, but didn't expect them to be coming compilation only.