This is a doomed sad story.
A boy and a girl grew up as childhood sweethearts. They each liked each other from elementary school, junior high school to high school. However, a hidden secret of their life experience spurred the two of them ruthlessly.
And one day, another boy broke into her world, and she was kind-hearted and didn't know how to choose.
When her two closest friends fall in love with a boy at the same time, should she keep him or let him go?
Later, when she knew the secret, she could only leave silently for each other...