Listen to the sound clip 17. M13 from Naisho no Naisho! ないしょのないしょ! - Video Game Music: 17. M13 17. M13 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