the answer is totally no. it isn't professional. if you reading yaoi never take it to the logic in the real world, ever! yaoi have their own fuck up logic, no matter if we like it or not.
then again the worker, Seme, in this story isn't professional either to his boss ╮( ̄▽ ̄)╭ so let's say look at this story has fiction only not real at all.
Well it’s not weird as you may think. My moms boss is super casual with her and so is he with the whole office team. They’re all friends and have social events together. I’ve known my moms boss and his son ever since I was little, and we’ve all been close since the beginning. And even I, her daughter is close with her boss.

hello, i just start reading and i have a question. is it normal for a boss to treat there emplyee like that, i mean i work in a company in morocco wich is not an advenced country like korea but my boss cant yell like that and we cant accept those things too. soo tell me is it normal or u know its just in the webtoon