I found some models of Neptunia series, but they are not R18 version.
Could someone share R-18 models of those CPUs ? (other characters are also okay, though)
Neptune (J&J and Jin Edit)
Purple Heart by MrJinSenpai
Purple Heart 4GO version by MrJinSenpai
Black Heart CM3d2
Yellow Heart (has some R18 variants)
This dude's tstorage also happens to have a bunch of R18 Neptunia models; but there's a lot to go through so I'll probably post the links later: