It was impossible for me to watch this without having the first season in mind, and maybe this was why I didn't like it that much. The thing that threw me off the most was the setback of Joon Ki's character. In the first season he had grew up a lot personally and in his career as well, but suddenly they bring him back to the same spot we saw him leave in the first season? I really didn't like that. Not only they did that, but also they didn't quiet explain how things ended up that way.
Besides that, I didn't connect with any of the main characters to be honest, I though the romance was kind of weak, their personalities weren't as interesting as I expected it to be, and not even the jokes were landing for me. It is a funny drama, I guess, but after watching season one I expected much more than was delivered, so it did disappointed me.
It's not a bad show, but it took me forever to finally finish it cause I didn't get attached to the story nor the characters.