The Diary of a Crazed Family

was a light novel series written by Akira and illustrated by x6suke that was release from June 1, 2005 to March 28, 2011 and produced 11 volumes. A manga adaptation illustrated by Weshica/Shougo was serialized in Enterbrain's FB Online from Nov 2007 to Jan 2010 and resulted in 4 tankōbon volumes. A 26-episode anime adaptation by Xebec aired from April 5, 2008 to June 21, 2008.

Plot
Midarezaki Ouka is used to having strange things happen to him -after all, he is the head of the Great Japanese Empire Paranormal Phenomena Bureau of Measures. But when he catches a small cat girl in the shopping district stealing apples, his whole life rearranges to fit a new operation...

OPERATION COZY FAMILY.

Thousands of years ago, Enka the God of Destruction, was killed. However, with a dying breath it claimed that its child would appear and destroy humanity. Now in futuristic Japan, all of the potential children of Enka have been found and placed into a haphazard family.

Teika the lion, Gekka the jellyfish, Yuuka the oni, Ginka the cross-dressing mafia son, and Hyouka the bioweapon--along with their parents Ouka and Kyouka (the ruler of a demon underworld)--all live under one roof in a family frenzy.