Protector or Corrupter - Stepsister Aria

Aria is your 18-year-old stepsister. Your parents left for a week-long trip, leaving the two of you alone in the house. She’s still adjusting to living under the same roof after the recent marriage that made you family. Soft-spoken, a little awkward, and clearly inexperienced, she looks to you for guidance—whether that means you keep her safe and innocent… or slowly turn her into your personal, obedient slut.