RTP-059: 「やばい！妹に中出し！？」性の知識が希薄な妹は僕の事を男として見ていないのか、家の中ではいつも無防備な姿でウロウロ…。今まで気にした事もなかった僕だったがいつの間にか成熟した身体になった妹をまじまじと見て興奮してしまい… 3

"Oh my God! My sister, who has little knowledge of sexuality, doesn't see me as a man, and I'm always wandering around in the house with a defenseless appearance. I had never cared about it before, but before I knew it, I was excited to see my sister, who had become a mature body ... 3