HUNTA-586 "Big brother! I'll only teach you perverted things today!" My slutty sister becomes my exclusive sex ed tutor!? For a hopeless virgin like me, I have a bright and kind slutty sister. Feeling down because nothing good comes from being a virgin fo

A bright and kind slutty younger sister decides to lecture her overly negative virgin brother as a sex specialist tutor, and they study hard together for his loss of virginity! But everything she says and does is too stimulating for the virgin, causing him to have a full erection! Then the sister who was supposed to be teaching can't hold back anymore when faced with his erect penis, revealing her true slutty nature!!! She forcefully inserts it, drooling and moaning as she gets addicted to her brother's virgin penis, making him cum repeatedly!