DJNJ-113 - My sister turned me into a futanari with a magic potion

After taking a mysterious potion from her sister, the younger sister wakes up with a surprise between her legs. Now a futanari, she gets teased and manipulated by her sadistic sister, leading to a forbidden incestuous encounter. The chaos doesn't stop there as she seeks guidance from a Queen, only to be turned into a submissive futanari toy.