Naisho no Hanashi Anime Details and Episodes Naisho no Hanashi is a pop song by the Japanese duo and idol unit ClariS, written by Ryo. It was released as the unit's fourth single on February 1, 2012… Series info Watch free DetailsFormatMusicStatusFinishedEpisodes1Duration4 minScore59/100SourceOriginalCountryJapan RelatedNisemonogatari (Parent Story)