Retro horror idol pop slips into whisper-level menace on ファントムシータ’s new MV “もーいーかい? (Mō Ii Kai?),” a song that plays like a deadly game of hide-and-seek in a haunted Shōwa dreamscape. The title comes from the classic Japanese children’s phrase used in hide-and-seek—“Are you ready yet?” / “Ready or not?”—which makes it a perfect thematic fit for the group’s eerie moth-to-flame mythology. Produced by ひとしずく×やま△, the track adds a slightly jazzy, theatrical swing beneath the horror-idol surface, giving the MV the feel of old-school mystery cinema filtered through modern idol noir.
They are an Ado-produced idol group under Cloud Nine, the same management ecosystem tied to Ado’s own career. The official profile literally states: “Adoがプロデュースを手がける” (“produced by Ado”).

