The boy in the movie is very lucky to have younger sisters who care about him, especially when he is sick. They not only encouraged him mentally but also gave him physical pleasures to help him partly relieve his illness. Knowing that her brother was seriously ill and being alone, her four younger sisters arranged to go to his house to visit him. When they came here, they decided to split up, one to clean the house, the other to take care of him eating, drinking, and bathing. However, all of them are very lustful, completing their work quickly but they also cannot forget to express their sexual pleasure on their brother's body. Even though he is sick, he still tries to meet their needs because he wants to thank them for what they have done for him.