Well, it is kinda irritating because of the environment he grew up where he needs to hold his emotion otherwise his heart beat will accelerate and ends up being dead .... because i think he has a hole in his heart where his heart needs to beat at constant not fast and not slow and in order to do that, he needs to be cold so that he could survive (づ￣ ³￣)づ
Well, he grew up with bitchy people around him so no wonder really. Seems like he did everything to climb the career ladder but his efforts were still not really recognized by his family ...
Yes it is annoying (￣へ￣) but i think its pretty normal since he is a director in a big company and he is also a son of the owner (i think) of the company and so i think its pretty normal for him to have that kind of personality (=・ω・=)
The MC's personality is actually pretty irritating but let's see where this is going.