Uhhh it's highly subjective, some like it, I didn't like it.
There's stuff with the one girl and her gangbangs, as you said.
There's one scene with the short-haired girl, forget her name, the boxing one, along with the other npc guy; Bai. IMO this was the only decent sharing scene in game.
Other than that there's a couple trans-sharing-type scenes with Adrian and other girls, I'm not into that so i never checked them out.
What I WANTED was like sharing scenes with Mari, or the kind blonde country girl; they have nothing.