Responses
It's basically like a bonding chemical that goes between them that is released like their scents.
It's not the process of drinking blood because the first time it happened it was on accident when Hyungwoo got possessive during the convo with Edric
Afterwards he let's out the scent/chemical whenever they are doing it or drinking blood for the sake of the kin bonding (plus it seems like it makes it hurt less)
What’s does the word assimilation mean in the context of this manga ? Lol