Angel 'N' Devil is the seventh series of the KO series. It is also known as K.O. Bad Girls, Angels and Devils and Angel 'n' Devil during the initial filming. It is the first series to be set in the Bronze Dimension. Despite being released after
The X-Dormitory (2014), it takes place 10 years before The X-Dormitory, and is concurrent with
K.O. One Re-act (2013).