Dark Gathering, Vol. 4 (manga)

The encounter with Ai’s ghastly groom may have devastated Yayoi’s defenses, but it also triggered the birth of a terrifyingly powerful new spirit. With this “graduate” in hand, Yayoi unveils her plan to capture the god. The only question is whether Keitaro can handle a whirlwind tour of Japan’s deadliest haunted sites.