Sayu’s dismal and lonely high school life suddenly blossoms after she meets her one and only friend, Yuko. But once vicious bullying directed at Yuko begins, the two friends plunge into misery.
"I’m sorry, Sayu."
Despite swearing to herself that she would protect her single friend, Sayu learns just how painfully difficult it is to do. Before long, their tale veers in the worst possible direction, the farthest cry away from their beloved golden school days together.