義妹はおっとりとした外見の真面目女子。でも実は無防備を演じおっぱいをチラつかせてボクをからかう小悪魔タイプ！しかも、その仕草が無意識なのかわざとなのか、そのギリギリのラインでボクの理性を試して翻弄するのが義妹の楽しみ。ついに、義妹のエロ挑発にボクの性欲は我慢の限界！気づいた時には義妹のおっぱいを後ろから鷲掴みして揉みしだいてしまった！すると義妹もそれを望んでいたのか自分からチ○ポを求めるほどド淫乱に覚醒！これはもう、ただの兄妹関係では済まない予感がする！

My sister-in-law is a serious girl with a gentle appearance. But in reality, she's a little devil who plays innocent and teases me by flashing her breasts! What's more, whether her actions are unconscious or intentional, she enjoys testing my self-control and toying with me at the very edge of what's acceptable. Finally, my sexual desire reached its limit with my sister-in-law's erotic provocation! Before I knew it, I had grabbed her breasts from behind and was kneading them! It seems my sister-in-law wanted it too, as she awakened into a complete slut, even asking for my dick! I have a feeling this will no longer be just a simple brother-sister relationship!