Kinichiro Imamura spent 3 years doing nothing in high school. On the day of his high school graduation, Kinichiro falls down the stairs at school. He soon realizes that he is back to the day of his high school entrance ceremony 3 years ago! Yoshiko Usami, who is the captain of cheerleading squad, talks to him.

Kinichiro's second high school days starts again … 

Imamura Kinichiro ends high school life with not a single thing; no friends or even memories. After the graduation ceremony, he for some reason goes back in time to the morning of the enrollment ceremony three years ago, and has a second chance at high school life. Contrary to Kinichiro’s expectations about the tedium of repeating the three years, the head cheerleader Usami calls out to him, and he sets out on a completely new high school life.