Except in the beginning though he stopped having pointy nails on one hand so he didn’t hurt the Ike when he put his fingers in. You can notice it many times throughout and also if I remember correctly it was mentioned somewhere? As for the mentioning of it I can’t remember if that happened or not but definitely don’t have pointy nails on one hand most of the time
Y'all haven't u read the Creator's note? Here's what she said about Jaeshin's nails lol! Our boy is actually super attentive and careful when it comes to his precious Nok...
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"Nas & C.R: There were so many opinions about the nails (lol). We couldn't say anything until now, but finally!! Here's our answer.
Jae-shin's sharp nails were planned from the very beginning.
They are a symbol of his otherworldly status, as well as a visual metaphor for how he changes upon meeting Nok.
For those of you who winced for Nok during adult scenes, Jae-shin's hands were banished for a while after Nok said it hurt the first time they did it.
Jae-shin may come off as self-centered and arrogant, but he actually is an attentive partner who pays attention to all of Nok's reactions. His interpretation of those might be the problem, though (lol). Nok, of course, thinks Jae-shin is just doing whatever he wants."

Am I the only one who feels a visceral pain whenever he pushes those long ass nails into the uke's ass?