"Mm!" Yang Yan nodded gently, "But there are so many strange constitutions and abilities in the world, I can't tell what's different about you."
The old man suddenly laughed:
"I am not human either; my true form is a Mountain Demon. Over a thousand years ago, I was indebted to my master with no way to repay, and until my master's passing, he asked me to look after this girl for him."
"At that time, this girl had only just transformed. Before my master passed, he said if I was unwilling, he could find someone else, but if I agreed, I would have no improvement in this life, a monster forever, with no hope of immortality, and urged me to think it over."
"How could I not aspire to join the Immortal Sect? But so what? To repay my master's kindness, I consumed the Transformation Pill, and from that day forth, I took on the role of this girl's grandfather. Now it's been a thousand years, and I am tired; I can finally rest."