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.
The tables finally turn when a classmate falls for Yoshimori. Could it be that Tokine is actually...jealous? Then, family duty calls when Mom sends a dragon-a-gram and big brother Masamori assigns a task that can only lead to temptation: guard the entrance to a mysterious magical site with your life, but whatever you do, don't go inside!