I think the scenario and the hard mode are complitely different though
Viewing post in Untitled UNDERTALE Vore Game comments
I'm not sure you're understanding what I'm saying here. The events in Hard Mode are likely only canon in that Eve obviously had to have fallen into the Underground, met Toriel and somehow crossed the ruins to get to her house and end up in bed at the start of said scenario.
That's it. So if anything in Hard Mode is canon, then that's the only part that is and nothing else.