突然の大雨による運休でズブ濡れ姿の姪っ子がボクの部屋にやってきた…女として意識した事なかったのに貸してあげたワイシャツの隙間から無防備に覗かせるオッパイやパンツがチラついて理性崩壊！！無自覚アピールしてくる誘惑に葛藤の末に負けてしまった最低なボク。

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Due to the sudden heavy rain, all train services in the metropolitan area were suspended. My niece, who goes to a school along the railway line, came to my house dripping wet... The shirt I lent her was too big, so I could see a glimpse of her breasts and panties! ! Furthermore, she presses her breasts against me... Is this teasing an adult? Or unconsciously? My rationality crumbles as my niece innocently teases me! ! My uncle's raw dick is inside my niece! ! There's no way you can't not get excited about an uncool relationship that you can't tell anyone about! !