Listen to the sound clip 19. OP from Naisho no Naisho! ないしょのないしょ! - Video Game Music: 19. OP 19. OP This sound is from Naisho no Naisho! ないしょのないしょ! - Video Game Music Video game music from Naisho no Naisho! ないしょのないしょ! for Windows. Published by Iris (2012). Uploaded by peterdao. Go to the full soundboardwith more sound clips Search