That happened when Nao was still a junior high school student. She found a bad boy lying on the roadside in the rain. But because she was timid, she ran away with only her bandaid and umbrella. Time flies, and after entering high school, Nao accidentally met the bad boy again. Nao was very afraid of being retaliated by the other party, but what she heard was "Please date me on the premise of marriage!"!?