Operation Sanctuary, known in Japan as or 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." ASCII Media Works published a manga adaptation for on January 27, 2005, serialized in Dengeki G's Magazine. Multiple light novels based on the game have also been published. Geneon Universal has produced several drama CDs. Plot Naoki Kazumi is a boy whose parents died in an accident five years ago, and his memory went along with it. Since he had nowhere else to go, he lives with his cousin Matsuri Shibugaki and her parents. Every morning before school, he is awakened by his childhood friend, Honami Fujieda, who keeps telling him that he is not a child anymore, but still comes to wake him up. These usual, ordinary days seem to stretch on forever, until one day up on the school's rooftop, while Naoki is taking a peaceful nap, out of nowhere, a girl falls out of the sky. This girl, called Mikoto Amagasaki, comes from 100 years in the future, and she went back in time with the intention of finding her brother. When Mikoto sees Naoki, she mistakes him for her brother. Characters Main Naoki Kuzumi The protagonist. He lost his parents and memory in an accident five years ago. He has living with his cousin Matsuri and her parents since the accident. Mikoto Amagasaki A girl who falls from the sky. Naoki thinks that her appearance in that manner was a day dream. Mikoto is from 100 years in the future and went back in time searching for her brother. Honami Fujieda Naoki's childhood friend. She has taken care of him since before the loss of his parents and memory. Matsuri Shibugaki Naoki's cousin. She is quite close to Chihiro. Chihiro Tachibana Matsuri's best friend and classmate. She is the lone member of the garden club. Yui Nonohara Naoki's homeroom teacher. The students love her in part because she is so short. Yui, like Mikoto, is from the future. Kyouko Nishina The school nurse. She is Yui's best friend