Tenkawa is a Sentinel with extraordinary abilities and skills. He’s one of the top three in Japan but his cocky attitude and overuse of his abilities make him more of a liability than an ideal partner. No matter the Guide assigned to look after him, Tenkawa always finds a way to attempt missions alone or refuses all care. But when Kuroi, a highly skilled Guide who trained in America, returns to Japan, he gets assigned to Tenkawa and the Sentinel may have just met his match in stubbornness!