A nurse's sister and a younger brother who is admitted to the hospital where she works. A virgin younger brother who erects even the smallest things in an ascetic life. The older sister who confessed her troubles from such a younger brother unavoidably helps with sexual processing, but the younger brother's actions escalate and the hands extend to the chest and hips. While refusing, my sister who witnessed her younger brother's gin erection Ji ○ port began to get excited, and finally she even got rid of virgin SEX ....