The man who satisfied the two sexy sisters! A sister who has lost her memory and a younger sister who seduces her boyfriend! Kyeong-ah recently lost her memory due to a major accident and is going to the hospital to get her memory back. Kyeong-ah doesn’t even recognize her younger sister, Kyeong-hee. Her younger sister Kyeong-hee has a boyfriend named Jong-gyoo. The doctor, who has lost his memory but is selfish to the sexy Kyeong-ah, convinces her that treatment in a lewd way will help her regain her memory when the treatment is not effective. They agree and have sex for treatment. After recovering her memory during treatment, Kyeong-ah runs straight home and kicks her younger sister, Kyeong-hee, and her boyfriend out coldly…
