Responses
In the novel, it's in Volume 3, Chapter 14.
As for the manhwa... maybe in about 20 more chapters? I'm not sure, but there's still a long way to go. For reference, it currently corresponds to Volume 2, Chapter 11. However, the male lead will get some hints.
What chapter would it be where the ML (Black hair) will find out that it's actually Abel? And which Chap is that in the novel? :>