Catastrophe Card King

"Doctor, it seems there's something wrong with my emotions."
"There's a clown in the West City circus who can make everyone laugh. I think he can certainly help you."
"But Doctor... I am that clown."
"..."
......
Waking up in a strange room,
Leonard Churchill finds himself lying next to a stunning woman.
Assuming good fortune has come knocking,
but the eerie part is, she's a corpse without any heartbeat or breath.
Just when he thinks he's been roped into a bizarre murder scene,
After a closer inspection,
He realizes,
Shockingly, she isn't human!
This is a fantastical world after the Great Catastrophe, under the fog-covered land lies countless Underground Cities left by the ancients.
A Treasure Hunter wearing a clown mask travels alone in the dark.
He is Joker Leonard Churchill, the Catastrophe King!
PS. If you're out of books to read, you can check out the already fixed 3 million+ sales old book "Mechanical Alchemist".