I spend my days studying and masturbating. But my life has changed completely because of my step-sister, a slutty gal who was born when my parents remarried! She makes a fuss every day and I explode with frustration! When I go to complain, she says "You're annoying" and in the end, she attacks me and says "I'll take your virginity!" and I am completely defeated... Should I let this grudge go? A sex battle breaks out, involving me, who doesn't lose her virginity even after cumming, and my step-sister's gal friends! My dick is in full swing against this aggressive erotic gal! Unrivaled!