First of all, whole story plot is predictable. FL saved ML from depression & ML supported her whenever she needs him. After 15th episode, their married life started in actual sense.
Initially, FL was too much irritating being clingy to ML. But i guess her clinginess treated ML's OCD. Initially she portrayed strong character but later her character went down as she always created problems because of her insecurities. ML was one the one who was patient with her throughout the series... Even i couldn't tolerate her sometimes but ML had way too much patience for her.

SFL was too selfish in the whole series that she lost everything one by one because of her own lies even after so much hard work. She got what deserve. SML was too biased. He is also somewhat selfish once its about his mother.

What i don't get why there is a need of breakup of 3 couple( Saemi- Young soo). No logic at all... Uncle-aunt's love story is comic & enjoyable.

Felt pity for FL's mom... She wasted her whole youth for such a despicable & disgusting person.

ML 's family was amazing... That's how a family should be specially in-laws relationship with daughter in law. On contrast other mother in laws were shown cruel to their daughter in law just because they don't them.

Most annoying character is FL's Biological Dad. Initially i loved his optimistic character but later he became most pathetic... He was too selfish to admit his fault & nade many people suffers just because of his cowardness. He didn't deserve anybody's love. Although he got his punishment but i wasn't satisfied with his ending.

Overall, this series is only watchable because of Main leads relationship & FL relation with her inlaws.