Mio works as a nurse at a hospital in Tokyo. One day, she almost got seriously injured out of carelessness and was lucky enough to find Takuya, her childhood friend, who broke her arm while saving her. And that’s how he ended up in the same hospital where Mio works. In one of her conversations, he told her that he would be very happy if she would take care of him. But Mio took Takuya’s words in her own way, she decided to thank him…