Once the ghost king returns to the human world, an immortal calls himself "an old friend"
It is normal for an old friend to invite you to stay at his home.
An old friend has a portrait of him during his lifetime, which is normal
The old friend wants to accept him as his disciple, normal...
His old friend won't let him recover his memories of his life, just... This is not normal
Intention: Things are changing, but what remains unchanged is impermanence