Waka Misono, Sumire Kuramoto, Maina Miura, Natsuki Kisaragi: Showing Off Erections in Situations - My Sister Wears My Shirt Again... Wait, Where Are Her Bra and Pants? She's Not Wearing a Bra!
Always wearing my clothes without permission, taking them off and putting them back on, my little sister is at it again—wearing my shirt. Wait, did I just see that right? She's not wearing a bra! And she's not even wearing pants, her panties fully exposed! This is way too much! Shocked, I can't help but notice my body reacting down below. Noticing my response, my sister suddenly starts fidgeting nervously. Though we've never felt sexual attraction toward each other before, an erotic tension begins to build between us, until finally we cross the forbidden line.