Mr kang is over the top obsessed with yunshin

I've read the novel twice while waiting for the manwha updates and everytime I see him so obsessed and deeply madly in love with yunshin when yunshin's sister tried to break them up, Mr Kang here went armed with threats in a meet up with her on how he'll destroy her socially and economically if yunshin did ever leave him. This goated dude basically will and does go to war with anyone who will try to make them to break up I swear Not only that he has to sleep with Yunshin on the same bed or dis dude will not sleep at all!

BUT! I love how he is still calm and mature when mentoring yunshin or talking about their job. Though he is like a mama bear later on when someone tries to armstrong yunshin in their firm. Now its making me read the novel for the third time if only I could remember where i read it