Description:

Shizuka Maku is just an ordinary high school girl with only slightly above average looks. That wouldn't be a problem but her older twin brothers are the school heartthrobs and beside them she always looks plain. The only boys who have ever been attracted to her are chased away by her over-protective brothers. Shizuka is the only plain person in her family and now her brothers have told her that she might not be related to them by blood. Now she is supposed to pick one of them to be her boyfriend. -AnimeNewsNetwork

Description:

In the ancient House of Nekogami, sibling rivalry is a game of life and death. The patriarch of the Nekogami family is dead, and his grandson Sukekiyo is the rightful heir. There is just one problem - Sukekiyo is away at war, whereabouts unknown. Only one person can inherit the fortune, and the triplets Yoki, Koto and Kiku aren't going to let Sukekiyo's fiancee, Tamayo, walk off with prize. With a fortune at stake, it's kill or be killed as the Nekogami family goes up against demons, thieves and each other to protect the family... and the cash! (Source: Broccoli Books)

Description:

The main character is a detective, Kazuhiko Amamiya, suffering from multiple personality disorder. Starting out as a violent detective series with a twist (the twist being the variant personalities that take over Detective Amamiya at various intervals), the series evolves into an exceptionally complex and involved sci-fi conspiracy story.