St. Cherine academy students, Haruka Minazuki and Aoi Kannazuki, have a strong friendship despite their contrasting personalities; Haruka's lively spirit versus Aoi's mature intellect. But their ordinary appearance and academic routine belies a secretive dimension of their lives that they will guard at all costs. For when danger rears its head in town, the duo transforms into the formidable Twin Angels, ready to battle against the forces of darkness. Brace yourselves, for the beloved Angels have returned and they are primed for action!