Stuck in his own childhood body ten years ago, Chiaki has accomplished one goal, at least—force himself into Kuon's life to the extent that the older man is fed up with him. But Chiaki's brother, Kaname, has gotten wind of where Chiaki's been sneaking off to, and he's hardly about to lose his precious little sibling to a stranger! Meanwhile, Chiaki has some feelings of his own to sort out when he spots Kuon with an old flame from his past...