Summer with Mia

You the protagonist, are an 18 year old that is about to finish highschool. You live with your mother, father and a hot sister (Mia).
The game starts 2 days before the end of school. You are behind in schoolwork and need to catch up on studying to pass. Your parents are going on a trip to France for a week. You are studying late at night when your sister comes home drunk.​

Fighting in this thread about content or kink-shaming will not be tolerated!
This game involves sharing of the main love interest as part of the plot.