Incubus Family

Marty spends his eighteenth birthday the same way he spends every other day, doing chores nobody thanks him for, until a succubus named Cindy turns up and tells him he's not a loser at all. He's an incubus, and it's time he started acting like one.

Cindy takes it upon herself to teach Marty the fundamentals of sex demon magic, and the first lesson is practical: enslave his sisters Sarah and Rebecca. The game also offers a gender-flipped version of the same story, with Maggie learning the ropes from Cindy while working her charms on brothers Seth and Robby. Either way, family loyalty doesn't survive first contact with demon blood.

Play consists of steering that seduction and domination through choices and light strategy, coaxing siblings from resistance to submission while Marty (or Maggie) figures out just how far this new power reaches. It's a small, family-focused corruption loop dressed up as a coming-of-age story, and it doesn't pretend to be anything grander than that.