Ghost Hunt, Seikimatsu Occult Gakuin Recommendations
Dark, Gothic and supernatural... the characters are interesting and they are trying to solve the phenomena that occur in their world and try to stop them.
The supernatural genres are similar. If your into occult, ghosts, monsters, and demons; then these two anime are for you.
Both series involve chasing after something paranormal. Be it ghosts or an object. Ghost is divided by arcs while Occult Academy is one whole story. If you like the "thrill of the hunt" Ghost Hunt might be the choice for you.