That'd take some pretty significant rewriting to make sense, such as how Nagisa was so paranoid she couldn't even trust Hifumi (which was what made the traitor's reveal so tragically ironic), but not impossible. Just doing one volume would also at least allow for enough airtime to actually do the character establishment necessary for non-players that is so often missing from gacha game adaptations.
Volume 2 would likely be the easiest to write sensei out of IMO. I don't think they had any real role that they were irreplaceable in, though it's the relatively weakest volume in terms of story.