Southern Cross(2001)

Southern Cross

Nobushina Naharu has always wanted to become a famous detective.
Her dream is to set up a "Detective club" at school, but the teacher requested that a club has to have at least four or more club members to be considered a club. So then, when she has finally gathered 3 other partners, she realizes that they are getting weirder and weirder one by one.

(Source: Sugar Oasis)