KTRA-586 [Uncensored Leaked] I showed my erect penis to my teenage sister, and the atmosphere became erotic, so I asked her if she wanted to have sex. - Misuzu Takeuchi

I showed my teenage sister some porn... Huh? She seems kind of excited? Maybe I have a chance to have sex with her!? "Want to have sex with your big brother?" My sister brushed off her brother's perverted remark, but when he showed her his erect penis, she started to feel a little excited... Her teenage curiosity grew and grew, and gradually the atmosphere became more and more erotic!