
Minseong had the time to say "it's me", so euigeon could have as well...

I agree! But the pregnant one is the only one that should be answering that question at any time that situation because their the only one that knows who’s been up in their business.. I still think it was incredibly stupid of his family to allow the contract to be canceled without him going to the doctor first. That just doesn’t make any sense or without speaking to their son who just knotted him. There’s a lot of plot holes around here.

Do I even wanna know the dog-arc? Please tell me this story doesn't contain bestiality...
On the other hand, yeonwoo looks so much better in this style than in the original stories

No, nothing happened
Spoiler
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In short:
Chase first rut, there was no one to spend it with. Grayson paniced and brought his dog Alex ( as a last resort, in his mind), Chase passed out. They took his pheromones out by injection.
Chase can't remember anything, but that there was a dog present. No one told him what really happened. And Graysons uses his doubts to get him to the pheromone parties, where they take out Chase's pheromones by injection after he passes out, since Chase is not willing to get rid of his pheromones any other way.
I'm still not used to him acting like a decent human being