My head canon is:
Dragonmire remains MC submissive in secret
All the LIs become harem members when they doubters realize that a man CAN love more than one woman at a time (poly)
Some of the LIs become couples together within the harem (witch and medusa, shewolf and zombie)
MC becomes a staff member as welcoming committee, werewolf counselor, and transition counselor for people who just discovered their inner monster.
Most student LIs also become staff members in their respective fields, the only exception is Rachel, who becomes a hot shot designer meshing the gothic vampiric with pastel colors.
Screw the Dev, I just made a better ending.