Upon entering high school, Rihito Kaburagi returned to his hometown and started living alone.

He reunited with his childhood friend there, but much to his dismay, she seemed to have changed drastically over the past three years. Time passed with his disappointment lingering, until sometime after he had become a second-year student. It was then that the student council president, known as the school's unattainable beauty, was apparently involved in a traffic accident and fell into a coma.

When Rihito, heartbroken by the news, returned to his apartment, he found his estranged childhood friend there.

Bewildered, the two of them found their story beginning to unfold anew from that moment.