One day Sakura Nanase meets Tendo Kairi and falls in love with him at first sight. To meet him again, she studies hard to become a nurse. Five years later, Sakura takes a job at a hospital where Tendo works as a doctor. But he turns out to be not at all what she had imagined him to be — being a perfectionist, he constantly makes sharp remarks to the hospital staff. But Sakura decides not to give up and works hard to attract Tendo's attention, and even gathers the courage to confess her feelings to him. Thanks to her perseverance and persistence, she earns the nickname Warrior at the hospital. And soon Tendo begins to pay attention to her.