The fact that this series was meant to be a commercial doesn't justify the frustration that I felt while watching. Starting from the tea that was being promoted: since it didn't blend well with ANY of the storylines, it just felt like a very insistent product placement. I wish this was the sole problem.
While I want to believe that the actors and the production team had to work with the little time they had for three different stories, I feel like they could have come up with much better stories than these.
The first story was just straight-out uninteresting. I appreciate the fact that GMMTV left more space for a GL couple, but I felt like the plot was being dragged by the hair- it felt unbearably slow.
The second story was slightly better than the others, but still annoying because of the plot holes. I believe that this one could work much better as a longer series after a couple of fixes, but the lack of time here made it feel very rushed.
Finally, the last episode was the most annoying, as they brought back the same tropes that were used in the main series. I felt like I was watching Cupid's Last Wish all over again and I don't mean it in a good way.

In conclusion, I believe these special episodes can only be truly enjoyed if you're a big fan of the actors, who are the main reason why I was actually able to watch until the very end. I get that the sponsor probably only cared about grabbing the viewers' attention with the cast, but it seriously felt like I was made fun of.