The story will revolve around the friendship and coming-of-age of two boys. It begins with Aoba Watase, a boy who goes to high school in Tokyo and lives a carefree daily life. On the morning of his school's opening ceremony after summer vacation, he goes to campus as usual, but he has a chance encounter with another boy.

The other boy's name is Jyunyou Dio Weinberg. Their encounter will soon alter the fate of the world.