After watching the trailer, I had high expectations for this series, especially regarding the chemistry between the two main actors. Unfortunately, I was disappointed. Mos and Bank are not my favorite couple, but they undeniably have incredible chemistry and look very cute together. I hope to see them in a better series someday. The other actors didn't evoke any emotions, mostly because of the poorly written script, which made them come across as whiny children. The two secondary couples, Prim and Pim, followed the typical "I love you but I can't tell you" and "I've been dumped so I'll throw myself at the first bidder" trends, which were a bit annoying. As for Sam and Yo, their dynamic wasn't executed well. Their sudden relationship felt random, and Yo, who should have been portrayed as a responsible adult, came off as a whiny teenager.

The trio of friends also disappointed me, as they seemed like a group of pre-teens who suddenly became adults and didn't know how to handle life's challenges, and were a bit nosy as well.

The two protagonists were perhaps the biggest letdown of the series. The characters, Sun and Lin, had poor characterization. Sun is portrayed as a rich CEO who doesn't want to do anything other than run around with his boyfriend, while Lin is depicted as a rich spoiled brat who only cares about creating jewelry, without any other worries.

The plot idea wasn't terrible, but towards the end of the series, it felt like there were only NC scenes and nothing more. Every episode felt like a waste of time, and I ended up skipping so much because I fell asleep. The historical part was unnecessary and didn't add anything to the story, apart from the ugly necklace. Also, the water thing seemed like a poor imitation of "The Sign."
The "daddy" part was so cringeworthy that every time Lin called Sun that, a part of me died.
This was perhaps the biggest disappointment so far.
{Sorry for my English}