隣に住んでいる女の子を想いながらオナニーするふたなり巨乳お姉さんのところに突然隣の女の子が遊びに来る。女の子も実は生まれつきふたなりで、お互い打ち明けると欲情してデカマラが勃起してしまい、女の子のデカマラをフェラチオしてはじめての射精を口内射精で受け止め、お姉さんの膣穴に生挿入！あまりの気持ちよさにアヘ顔同時イキ！【ZIRAN:紅白合精~姉受けふたなり少女精通談~】 - エロ漫画の禿

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