Shura lost both of her parents in a strange accident when she was young and it was then that she began to see "something" that was not supposed to be. Orphaned, she works part-time while searching for her grandfather. When she tries to have the police find her grandfather who said "I've been waiting in the mansion in Sakura no Mori." She tries to find this place with the help of a demon who came from the boundary between the present world and the ghost world, Tokinoseki, who was attacked by a monster.