Detective Revolution

Recently an exceptionally skilled female detective has appeared, and the identity of this highly talked about figure is actually high school student Seika. The case she has taken on this time involves the search for a client's missing younger sister... but now even the younger sister's fiancé has gone missing...!?

(Source: Shueisha, translated)

Included one-shots:
Volume 2: Take Off!!
Volume 6: Rin☆Rin☆Ring