I was lured by this because apparently Koreans really valued this series for destigmatizing single motherhood.

But when we learn the single mother is in this predicament by her own choice and for no reasonable motives AT ALL the show loses all relatability and verisimilitude. She basically decided not disclosing her pregnancy to her then boyfriend for unexplainable reasons, which is infuriating in itself because both the kid and the father have the right to know their biological family in this case.
And then we discover that her baby daddy is a rich athlete on top of that. So she made her son and herself go through hardships just CAUSE. She deprived her son of a more abundant life, perhaps with better education and whatever money can buy for nothing.

And then we have some more tired tropes like the FL being a doormat to the horrible people that live in that small town.

And this is all I could endure. The dealbreaker was really the baby daddy reveal.