The murderous music that has been sleeping for a hundred years once again sounded the mournful melody. A person walked alone to the window sill in the pale moonlight. His shadow blended with the other shadows through the pale moonlight. His shoulder was lightly tapped. When you turned around, a pair of blood-stained hands pushed you into the abyss that will never be recovered. The black and bloody haze enveloped everyone's heart. It was like a spring rain, quietly changing everything...