Whose Ring Grandpa Is a Demon Venerable?

Ji Wuyu drew a ring, only to discover that it housed a demon lord from another world.

Even stranger, he had once read about the demon lord's entire life in an abandoned web novel.

Why did the novel document a real otherworld? And why did the ring end up in his hands?

As one urban anomaly after another appears, he is forced to step into the world hidden beneath reality.