Desc: Sword Art Online: Progressive - Khúc Độc Tấu Trong Đêm Vắng Sao: Directed by Ayako Kouno. With Yoshitsugu Matsuoka, Haruka Tomatsu, Inori Minase, Hiroaki Hirata. High school student Asuna struggles to survive with a young swordsman after its revealed that she is trapped inside the game of Sword Art Online, where if your HP drops to zero, your brain will be destroyed in real life.