"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...

「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…。