I don’t think you can say the snake is lying. The grandfather is gonna pass at some point and they both know that. The snake for sure delayed that process tho and is letting the MC have more time with him. I think without the snake the grandpa would have already died.
I’m thinking maybe it doesn’t work because the grandpa doesn’t WISH for it to work. Grandpa knows the circle of life and I doubt he wants to live forever. Geumryang is in denial as most people are when they don’t want to let go of a loved one. Grandpas probably gonna sit down with Geumryang and eventually talk to him about it
Umm so the snake is lying to him? After he said he wouldn’t lie?? :( I feel so bad for this dude, he’s literally going through sex and eventual pregnancy not to mention birth for essentially nothing. I kind of hate this snake guy, like maybe find a person who’s wish you can grant and propose them this deal