This 2007 single preceded Shimamiya's 2008 album, *Omoide Shomeisho*, and features the theme song for the anime *Mouryou no Hako*.
- "Naraku no Hana" was co-written and produced by Masatomo Nakazawa. It was Shimamiya's second single released on NBCUniversal Entertainment. The single reached number 46 on Oricon's weekly singles chart.
- The B-side, "Innocent'', was also featured in the anime as an insert song.
- The anime *Mouryou no Hako* is a mystery series based on a novel by Natsuhiko Kyogoku.
Eiko Shimamiya is a Japanese pop and R&B singer. She is best known for her contributions to anime soundtracks.
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