Mainichi Suki Shite

An accident put Mutsumi into a coma. One year later, he miraculously awakened, but he had lost his memory. He was released from the hospital immediately since he had fully recovered in the meantime. Two girls came forward and claimed that they were responsible for the accident that he got hurt in. These girls - sisters, he learnt later - promised to take care of him until he recovered his memory. He decided to go back to school right away but since it was the summer vacation he had nothing to do, so he decided to allow the girls to do as they want. But is it OK to spend the summer vacation with these two girls not seeing anyone else?