When Yang Hao woke up, he discovered that he had somehow spent twenty years in another world.
Not only did he have a duchess wife who had mysteriously died of an illness and two daughters in their early teens, but even the servants around him were looking at him with a strange, dangerous glint in their eyes.
"What on earth did I do for those twenty years?!"
Screaming, Yang Hao used his phone System to escape the threats closing in on him. But after fleeing the ducal estate, he ran into a holy knight who seemed to have been betrayed and taken advantage of by his past self...
As he stared at the holy knight's horse ears and ponytail, and the spear pointed threateningly at him, Yang Hao shut his eyes in despair and swore that, if he got the chance...
He would absolutely find out what he had done over those twenty years.
The main story focuses on hypnosis, uncovering the truth, and a yandere kitty~ QAQ, hope readers will read it according to their preferences, meow~