Your Sister's Annoying (But Cute) Best Friend Sneaks Through Your Window (Flirty) (Is Your Sister Around?) (Bad Girl) (Reverse Confession) (Patreon)

You hear a tapping on your bedroom window late at night, and are surprised to see it's your sister's best friend. Your sister just got a new boyfriend and is spending ALL her time with him, leaving her best friend feeling bored and lonely. Will you keep her company?

Art by Vivian Valentin!