MDTM-318 Can I resist my sister's real temptation?! Ayame Sasahara

I returned home for the first time in a while after entering university. However, my parents were not there, and I ended up alone with my little sister who had transformed into an ultra-cute female high school student! Moreover, my sister Ayu, seemingly oblivious to me, was seriously trying to seduce me! Her nipples peeked through her pajamas! She cleaned my room wearing only her panties and even came to spy on me while I was taking a bath. She entered my room while I was sleeping and gently stroked my rock-hard dick as I masturbated, bringing me to the brink of explosion! Can I resist my sister's serious seduction?!