The older sister is a nurse and her younger brother is hospitalized at the hospital where she works. The younger brother is a virgin who gets an erection from the smallest things due to his abstinence lifestyle. When the younger brother confesses his troubles to the older sister, she is forced to help him with his sexual needs, but his actions escalate and his hands reach for her breasts and ass. Although the older sister refuses, she also becomes excited when she sees her brother's rock hard cock, and they end up having sex to lose their virginity...