 If you liked
Jibaku Shounen Hanako-kun
|
 ...then you might like
Kara no Kioku
|
Both deal with the main characters being introduced to a cool paranormal world, driven by an engaging mystery. Also, both have occasional (and not overblown) action sequences and are just simply fun! Also, the side characters are very prominent and reoccurring, which makes them very important to the story and unforgettable.