The main character attends a school with a rarely seen "no romance" policy. Although the school rules are rigid, he is enjoying his school life in his own way.
One day, a new student comes to the school.
He wonders what kind of person she is, but it turns out to be a girl (customizable heroine) he'd been separated from after he'd moved away.
Surprised and pleased to see each other again, she invites him out after school. What awaited him was her confession...

[translated from DLSite]