Kekkaishi 16

By night, junior high student Yoshimori Sumimura is a "kekkaishi"--a demon-hunter who specializes in creating magical barriers around his prey. By day, Yoshimori's got some other demons to battle: an addiction to sweets and a seriously crotchety grandfather! Yoshimori's pretty 16-year-old 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 yourself!