Some possible plot developments, since the developer said this is not a classic harem game.
The protagonist spends most of his time masturbating, secretly watching the mature women he likes getting fucked by other men.
The blonde exhibitionist slut on the street corner loves outdoor gangbangs and invites the protagonist to join.
He shares his own milf with others (like his male classmates).
participates in 4P sessions with couples in the park and wife-swapping events.
Meet a female-dominant mature woman who trains and plays BDSM with the college-aged male protagonist.
The protagonist stands outside the room door, while his milf partner is being sexually assaulted by another man while she is pressed against the door.
Usually, non-classic harem games all include this kind of content.
At its core, Milfheim: The Twisted is a harem story. However, it depicts free, realistic relationships between men and women. Remember: these women are mature, middle-aged characters(Most of them are sluts who will have sex with everyone.).