Kekkaishi, Vol. 3 (Kekkaishi #3)

Students by day, demon hunters by night!

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.

When he's unable to capture a particularly nasty foe, Yoshimori vows to improve himself--even if it means spending less time baking cakes! Then a specter from the past visits Madarao, Yoshimori's loyal demon dog, and attempts to lure the canine away from Yoshimori forever.