Nishiki has a fiancé arranged for her, but when she meets Atsumori, the high school student visiting from Tokyo, she chases after him and enrolls at his school. As Atsumori helps Nishiki adjust to her city, her feelings for him only grow stronger. One day, a surprise rain shower ends with Nishiki going to Atsumori's apartment. But while the two are there, Atsumori's mother suddenly appears! Nishiki is flustered by the rapid development, but then Atsumori introduces Nishiki as his "number one choice for a bride"?! Nishiki's life as a temporary girlfriend begins in Volume 2!