SPOILER
This is an excellent series, dealing with a complex plot, although many aspects are fictional, it portrays a single mother that refused confessions of four males (including her daughter's father) because it is simply not easy for her to open her heart again after she spent 14 years of her life only on raising her daughter the best way she can, I would like to add that the characters are not perfect, they are humans, they all make wrong decisions in one way or the other but not because they intended to hurt others, it is because, to them, this is the only way to protect those around them. The interaction of the main characters were very good, there aren't many romantic scenes (as this is a family-oriented drama) and the touches of comedy make the show more entertaining. The plot development depends on a lack of communication between the single mother, her daughter and her daughter's father, but that is the reason why things go wrong in the present times and events take place naturally, it also provides scope for some excellent acting (especially in episode 11). The four male leads particularly form a unique and always interesting group of successful men with various motives and personalities, the only thing that they have in common is that they are willing to do whatever they can to protect the female lead and support her. The series is certainly worth watch time, I hope you would ignore those negative reviews that some people have posted.
Please watch it only on Netflix
If I were to pick my favourite characters, I would pick: Oh Ha Nee, Gu Pa Doo, Oh Dae Oh and Noh Ae Jeong, Noh Ae Jeong has a special place in my heart and I feel really sad when people say that she's annoying, I - on the other hand - understand her point of view and sympathize with her, it must have been so difficult for her to decide to raise the baby alone and she did not notice that she could have taken away the right of the father and daughter who lost so much time away from each other, she didn't mean to do any of that, she just tried to protect her daughter by building a virtual wall between her and the rest of the world, she didn't know that the daughter was more mature and stronger than what she imagined her to be.
The ending was actually cute and it is okay for the mother to walk her daughter down the aisle, it doesn't mean that she didn't respect the father, she just wanted to fulfil her last mission as woman who used to be a single mother for 14 years, she wanted to walk with her daughter towards her daughter's happiness, the leads get together in the end, so it is not an open ending, we know that they were together by the time the wedding took place, we just didn't get to see them living together or see more romance between them.