It seems like the writer cannot focus on more than one thing at a time, everything else is neglected, brushed off and barely got any attention. The story divided into three sections: the love triangle thing then Jin Woo & Na Yoon and lastly the section with the biggest chunk "the missing husband". The 4 listed main characters are only relevant for the first 1/3 then the remainder 2/3 is mostly (Yoon Jung - Eun Hye and Shin Ok/Taesu). Han Jin Kyung may appear once every 10 episodes and Han Soo Hyun got a random side story after the first 1/3. There was a clear shift in tone starting from episode 63 where the drama turned full melodrama, I wish they kept the same vibe as earlier parts. The last 20 episodes were endless repetition of the same words.

Because of the "main" conflict, not a single couple ended up as I hoped, the ending is just unfair and was handled poorly. Han Soo Hyun was treated worse than a support character after the love triangle plot line was finished, they absolutely destroyed her character. Even when they tried to give her a story there was zero romantic build up, all we got is a time skip of her future at the end. This drama sucks when it comes to building relationships and romances. You may dislike Han Jin Kyung at the start, rightfully so, but you will end up hating Na Eun Hye for shamelessly guilt tripping her "husband" by using their daughter, even other characters hope on the same train.

One thing really bothered me is how not a single character had the slightest drop of inelegance to suggest doing a DNA test, instead let's just spend 70 episodes of endless doubts and stairs. Also, some of the casting decisions didn't feel right, the following actors didn't fit their character: Oh Man Suk, Jung Sung Woon and Lee Jong Won. The drama is watchable but it's a bit rough after episode 63.