"Is there really a regret medicine for sale in the world?"
"Indeed, it does, but it comes at a cost."
"How much can I sell it for?"
"I only need one tear from you! But it must be tears from the heart. I don't want crocodile tears."
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.
In my opinion hell, underworld is just a joke