Like the OST, cinematography, Dong Hoon actor acting, supporting cast.
Dislike: Ji An acting... Like there is only one expression on her face the whole time.

I tried very hard to like the Dong Hoon and Ji An but just simply couldn't sympathize, especially Dong Hoon.

Dong Hoon married his wife, had a kid, was content with having his wife be the breadwinner yet be depress the whole f**king time because someone he hated got the big gig. What did he do to get out of that??? None, until someone threatened him. What does that say about him as a person?
He spent every evening after work hanging out with his buddies, his brothers, or his mom. What about his wife? His excuse was that she wasn't home. Well, apparently, they had mismatched schedule. What did he do about that? None... until his wife gave up and seek emotional solace somewhere else; then he felt bad. Should have seen that coming.
His mother resented his wife because she was more successful than him, even though her salary gave her the financial support she and her boys needed. His wife knew this but still tried. His wife tried to establish their family away from the extended family but he wouldn't hear of it.
So, is it his wife's fault only that they have problem? Where is the acknowledgement that it takes 2 to make or break a couple? I wish she divorced him and found some measure of happiness.

Ji An was the annoying female tsundere the whole time. Her poor background permitted her to do whatever she can to solve her and her people problem, regardless of the impact on others?

Like I said, I tried to like them but nahhh...