Have you read the latest chapters?
The brothers told him that Nok will die soon anyway T_T so he doesn't need to kill him (well Nok will also hate the fact that JS knows he will die and doesn't tell him..also it's better that Nok will die by "fate", because then Jaeshin would also receive another punishment for killing another human)... also there will probably be some more problems, because they mentioned that Jaeshin can't take a simple human to the afterworld, as they need to reincarnate, so I'm curious as how the author will solve this.
Oh my god! My babies let’s wait for the happy end and see what’s gon happen
And it’s against their law to tell the person he’s gon di3 soon so even if he wants to tell Nok he can’t. That’s just my assumption. ╮(￣▽￣)╭
But he does. And nok says its fine or something
Girl stop! my heart!!! I hope they’ll be happy after all of this
Didn’t read the latest chapters but if he did then I guess Nok just accepted his death. ╥﹏╥
In the raws, Jae-shin’s brothers are concerned about how Lee Nok will feel after Jae-shin returns to the underworld, saying, “Well… I guess out of sight, out of mind…” and Jae-shin replied, “Why did he have to be out of sight? I’m taking him with me.” Broooo Nok will haaate that