The Yin-Yang Master: Dream of Eternity

Every few hundred years, the most powerful demon on earth—a snake demon—awakens, and the Yin-Yang Masters are summoned to the capital. Meanwhile, the Princess of the realm has her own plans, as she conspires to claim the demon’s power.

Per Aspera Ad Astra

Set in the near future, the story revolves around the emergence of the virtual dream reality technology "Good Dreams", which allows people to do whatever they desire within their self-created dreams. However, a crisis triggered by these dreams quietly unfolds.