Genuinely speaking, if the party somehow ends up being this off-the-wall gangbang then I think the dev might alienate a lot of people since it's such an absurd escalation of events compared to everything thus far. How would you resolve that situation? Where would you go after that? The drug doesn't exactly erase memories either so now you've potentially entangled a LOT of people into some sort of Pythagoras' abomination of intimacy.
Moreover, what you do while under the influence especially when you also remember it, will have the exact opposite of progress for someone like Ashe who's basically dealing with trauma and the absolute anxiety of someone finding out what she is, she's been emotionally distancing herself from everyone for years to the point where I would suspect that she's extremely afraid of being judged - meaning that if she remembers herself acting like a "futachad" while under the influence, it's likely that she'll shut herself in and avoid people after that.
So yeah, I don't actually feel like that kind of development would actually be good for the story, it would just be another notch in the "hey Ashe is a punching bag, let's fuck with her some more" that the story has been doing a LOT of thus far. For each small win, she's taking multiple L's and that tends to get extremely tiresome.
You might be waiting for a long time in that case. Ashe is naturally very non-confrontational due to her mental health issues, so you'll likely have to deal with those routes for a long ass time given that the dev tends to do things their way.