Hikari, who works as a nursery teacher and lives a modest life, got engaged to the son of a wealthy man whom she met through a friend two weeks ago, and the wedding is scheduled for one month later. Hikari thought she would be happy like this, but one day, the other man's parents tell her that she must go to a certain place to train as a bride. It is an old custom that has never been made public, and is only done within the family. Although she felt uneasy, Hikari and her fiance came to this place...