Tsuki wa Higashi ni Hi wa Nishi ni: Operation Sanctuary , known as Hanihani (はにはに) for short, is a Japanese adult visual novel developed by August. It was released on July 20, 2003 for Windows using the NScripter engine. The Dreamcast and PlayStation 2 versions were released by Alchemist in 2004. An anime adaptation was broadcast in Japan in 2004, and originally ran from June 30, to September 22.The title references a haiku by Yosa Buson: "Nanohana ya tsuki wa higashi ni hi wa nishi ni."
