Well, even the title literally suggests that this story is about a timid introvert + straightforward extrovert. What did you all expected? We already know how the characters are from the very beginning. Had he been a different temperament type the story would have ended by now or turned into a pornhwa. Not everyone in the world are masculine macho-men and the other question is how many would really sleep with their boss without even dating them?
For now I like the overall dynamic and wait for a bit of a drama with his ex(?) girl(?)-friend