Living in Okayama, Okayama, Hisashi meets Mai for the first time at a restaurant party, but she lets him know she doesn't like his sullen attitude. He apologizes, saying he had been nauseous all day, and Mai, feeling guilty, cheerfully sees him off. The two begin dating and after a few months, the shy Hisashi finally asks for her hand in marriage. She says yes and they go so far as to reserve a place for the ceremony when Mai starts suffering lapses of memory. One day she suddenly experiences an extreme seizure accompanied by hysteria.