Night Troops Arrive
Yoshimori feels quite crowded when Masamori and the Night Troops move into the neighborhood. He is further surprised to see that his older brother, Masamori, has ordered a few of his troops to assist the Kekkaishi of Karasumori.
Aired 13/11/2007EP 42 - Night Troops Arrive

2006
Kekkaishi
Yoshimori Sumimura is a 14-year-old student at Karasumori School. Following in the tradition that's come down through the generations, he is the twenty-second Kekkaishi of the Sumimura clan. But he’s constantly fighting with his rival, Tokine Yukimura—his childhood friend and also a Kekkaishi—about who is the rightful heir to the magical barrier arts. Protecting people from danger while growing stronger himself, Yoshimori will battle the forces of evil again tonight!
(Source: Crunchyroll)