「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…
"Oh no! I came inside my sister!?" My sister has little knowledge about sex and doesn't see me as a man, so she always wanders around the house in a defenseless state... I had never paid any attention to it before, but before I knew it, I was excited to see my sister's mature body...