Can't Stop Cursing You, Vol. 4 (manga)

A new deadly puzzle, a new lethal game...When a Curse God Contractor goes on akilling spree to earn her place as a servant to her beloved Minori, it's up to CurseBreaker Saeyama and his assistant to stop them in their tracks. Only problem is, theContractor seems to be part of the mega-famous band Maid-On. Can they get throughall the corporate red tape to investigate which member of the trio is the true culprit...?!