【The popular doujin circle 'Kuramubon' brings its hit work to life with healthily busty beauty Nami Nanase in her first live-action collaboration!】 A brother tries to resist his stepsister's sudden confession with reason, but he can't help but cross the forbidden line when faced with her intense and cute charm. From that point on, the two of them couldn't stop themselves at home or in love hotels, spending their days entwined. Meanwhile, the brother was burdened by guilt over whether 'this relationship is acceptable,' while the sister, oblivious to her brother's hesitation, became increasingly bold... What is the 'final decision' made by a cornered older brother?
