Dark Gathering, Vol. 3 (manga)

An unwilling magnet for the supernatural and a ghost-hunting little girl join forces to capture Japan's most terrifying and dangerous spirits. After a dangerous encounter with a malevolent spirit, Keitaro Gentoga wants nothing to do with the supernatural. Unfortunately for this reluctant ghost magnet, he's stuck helping Yayoi Hozuki, a strange young girl who's intent on capturing Japan's most terrifying ghosts and ghouls.

It's official-Keitaro and his childhood friend Eiko are an item! Unfortunately, there isn't much time to celebrate their new relationship status as Yayoi sets her sights on a new spirit and Keitaro takes on a new pupil-an accident-prone high schooler with her own haunting secret.