Kekkaishi, Vol. 17 (Kekkaishi #17)

By night, teenager Yoshimori Sumimura is a "kekkaishi"--a demon-hunter who specializes in creating magical barriers around his prey. By day, Yoshimori's got other demons to battle: an addiction to sweets and a seriously crotchety grandfather! Yoshimori's pretty neighbor and childhood friend, Tokine Yukimura, is also a kekkaishi, but their families are feuding over who is the true practitioner of the art.

Yoshimori and his elder brother Masamori are trapped inside a magical realm... The site's guardian wants to steal Yoshimori's body, and a renegade council member pits brother against brother! Which of the two will escape? And what will become of the other...?