The series follows a boy who meets a "generally cute" girl named Tsukasa the day after his high school entrance exams, and immediately falls in love with her. Nasa confessed his feelings, but her response is that she will only go out with him if they get married. Years later, she suddenly appears after Nasa hits 18 and they get married, and thus begins Nasa and Tsukasa's newlywed lifestyle.
[Source: Anime News Network]