Who is playing the piano when the sound of the piano comes from the ancient house in the middle of the night? What would it be like for a primary school student to be possessed by a ghost while exploring an old house? What kind of unknown story is hidden behind the amnesiac ghost? Is it the lack of law or the loss of morals... Let us go into this column "The Musical Master" to reveal to you the terrifying story of a thousand-year-old haunted house...