@whoosh It's possible.
The length of one's life is not exactly part of the contract. The deal has always been, he'll take their soul to hell after 10 years. There was no provision that he'll make sure they'll live for 10 years (unless that's the exact "wish").
And sticking to the "demon" theme, it would be expected that the contract is one-sided. If the demon expires, whatever he gave them will revert or stop (like the sick child). But if they die early, their soul is still his to take.
In that scene, he probably said something like, "You're about to die even though you still have a few years, I'll take your soul now." ^_^;;
@s1m0n4 @EllenInEdmonton @kdrama@chirp.social @kdrama@a.gup.pe