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 Kokuboro ayakashi launch a major assault on the Karasumori site to siphon its magical energies to heal their ailing princess. When our friends' mysterious new ally Gen pulls out every last stop to battle them, they make him an offer he can't refuse: join their demon alliance or perish!

Tragedy has struck the Yoshimori site, and each of our friends attempts to cope with their grief alone. Tokine searches for a secret way into Kokuboro's castle, Yoshimori trains for an ultimate confrontation, and Masamori returns home with a regiment of his night troops, leaving his little brother with no room of his own. Unfortunately, before long, one of our three heroes is in need of a rescue...

With Yoshimori held hostage by the Kokuboro ayakashi in their impenetrable fortress, the stakes are higher than ever! Infighting within the Kokuboro cadre may provide the chink in the armor his friends need to rescue him. But can Tokine and Yoshimori's families overcome their centuries-long feud to unite and overthrow their common enemy...?

The fate of the dreaded Kokuboro ayakashi lies in Yoshimori's hands as he and his allies fight to get out of Kokuboro Castle alive! By comparison, his formerly hair-raising nightly patrols of the Karasumori Site seem like a walk in the park. But if he survives and returns home as the conquering hero, does an even greater evil lie in wait...?

While his big brother Masamori takes heat from the fearsome Council for the calamity at the Karasumori site, Yoshimori attempts to outsmart an ayakashi who saps his opponent's strength with mind games. Then, when Yoshimori decides to play good Samaritan and help a raven-like ayakashi, will he end up crowing with pride or swearing "nevermore"...?

A vicious ayakashi is growing inside Yoshimori's school, feeding on the energy of the Karasumori site... If the ayakashi stays, it will grow ever more powerful. But if Yoshimori defies orders and attempts to dislodge it, it could ravage the entire city!

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!

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...?

Brother must rely upon brother in a daring escape! So why does Masumori send Yoshimori's friends to spy on him at the Karasumori Site? Then, when a flock of beautiful butterflies descends on Karasumori High School, all the students fall ill... How can Yoshimori single-handedly battle thousands of tiny ayakashi without harming the people in their midst?

Yoshimori and Tokine have successfully vanquished the thousands of butterflies that swarmed on Karasumori High School. But the mystery deepens when the perpetrator of the attack turns out to be a medium that delivers a warning of unspeakable horrors to come! Perhaps some answers lay in the past of Yoshimori's family...

Although Yoshimori and Tokine often quarrel, they battle demons side-by-side almost every night. When the two barrier-masters must confront Oni Yoki, a dangerous demon-charmer, their partnership weakens. Can they fight together to keep their world from the clutches of a power-hungry monster?