Synopsis:

Three years ago, Tomoharu gets involved in a plane crash and lands in hospital, where he meets Misao, a female ghost. Three years later, he starts to live alone when his mother remarries. On his first day there, a mysterious lady, Shuri, gives him a silver suitcase and says that it was from his brother who was overseas. then, people started to attack him and asks for something called "Asura Machina" and "Extractor". Realizing that it was the silver suitcase, Tomoharu decides to let it go, but was asked to open it by Misao and Shuri. He does so, and unleashed a large black knight-like machine known as "Asura Machina".