Nombre original: 「HELI-X 〜スパイラル・ラビリンス〜」
Fecha de estreno: 30 de junio de 2023
Película
Tiempo promedio: 0 minutos
Géneros: Acción, Ciencia ficcion
Sinopsis: The fourth play in the 'Heli-X' series. When Sadness woke up, she was alone in a dimly lit place. A small ray of light illuminated the knife in her hand. When she looked at the ground, she saw a large pool of blood and a motionless body... A corpse with a face she recognised. Was Sadness the one who killed them?