Mio works as a nurse in a hospital in Tokyo. One day, out of negligence, she almost got serious injuries, she was lucky that Takuya, her childhood friend, who saved her, broke his arm, was nearby. And so he ended up in the hospital where Mio works. In one of the conversations, he told her that he would be very happy if she looked after him. But Mio took Takuya's words in her own way, she decided to thank him well ...