I feel like splitting this series in two parts for this review (the first six episodes and the last six) because I had a very different impression from each part. While I did end up enjoying the series a lot and I believe it deserves this 9 out of 10 I chose as my rating, I still need to express a complete opinion about it.

Overall, the story has an interesting premise, but the first six episodes were not able to give it a proper start. The pace of the events feels way too slow, and the dynamics between characters are off as well.
Noey was portrayed well and caught my attention enough to keep me watching for more episodes, but Thi's characterization was handled very badly, showing some backbone for about ten seconds per episodes and then turning back to his shy, fearful and goofy self - and I don't mean it in a good way.
These first six episode could have been useful to put more emphasis on Thi's characterization and the dynamics between Noei, Thi, their friends and their families, but instead they seemed mostly full of nothing. I felt like they could have been cut down to three episodes with a better pace.

Starting from the ending of the sixth episode, the events and the dynamics get a lot better, and this is also where the series starts shining bright. Thi also earns his own proper characterization and starts showing his own presence next to Noey, making their moments together a lot more enjoyable and endearing to watch. The way the feelings of both are portrayed along the way was also beautiful and left no room for any annoying "will they, won't they?" as the episodes went by.
The groups of friends were also shown much better, especially Noey's gang, with Thiw as a special mention. The "bad boy" element was not just used as a fancy aesthetic and multiple elements of that life were taken into consideration for the plot, which I really appreciated.

A very memorable series, I highly recommend it!