When I returned to my parents' house for the first time in a while, my younger sister , Kanon, who is now a super cute high school girl, appeared in front of me... but my parents were not there. My Kanon, Kanon, was taking a nap in the living room with her underwear completely exposed, and wandering around in just a bath towel... She came into my room while I was sleeping and gently stroked my hard cock while I was masturbating, and I was on the verge of exploding! Can I really withstand my sister's serious seduction!?