Are we talking about being an item or just laying with them? Because most of the scenes don't require you to have sworn your undying (heh) love to anyone… Just sayin'.
Anyhow, you're probably looking to be stumbled into a harem. This requires a smidgen
*cough* of infidelity on your part but 'nets' you Rachel, Sofia, Nina, Maxine, and Lily. Possibly Anne, too. The first three need to be made your girlfriends without them knowing about each other (cheat on them
like so), Maxine needs to be courted to later join, and Lily needs to be courted and investigated – see
this if you enjoy Sofia – so she doesn't end up
killed or worse expelled (keeping a
theme, here). You will still be able to shag Emily, Grace <3, and Olga, but you won't make any of them tangible, truly happy, or alive (you'll get this later) unless you drop your harem then and there. Which actually may lead to 'the most' of what you'd enjoy… Dragomira is a side hustle for now, Dermila has just the one scene (
nudge, nudge), and Felvia… is Felvia.
*shrug* Hope this helps!