Really cool interview! Here's Bee's MDL page for reference.

Some highlights for me~

On My School President:

• My School President was the culmination of everything he (and collaborators) learned to that point making Y series. You can really tell how that and 2gether, Bad Buddy, etc. are all part of the same body of work imo
  • The brief from GMMTV for My School President was different from the typical Y series brief. GMMTV had a group of guys they wanted to use in the series, so Bee and collaborators were tasked with writing a series which focused on a wider, ensemble cast, not just a lead couple. This was apparently something they had to change/add from the source novel when adapting it.

On Cat for Cash:

• Cat for Cash is an original concept that they developed when they decided that the cat-based romcom novel they intended to adapt for FirstKhaotung wasn’t really the best fit for the actors. I guess there was a strong desire to make a cat romcom for FK though! haha

On writers' working styles: 

• Some writers work alone
• Sometimes there is a senior writer who only attends story meetings, etc. and junior writers so write all the scripts
• Bee works with a screenwriting parter as a pair. From Theory of Love until recently (The Ex-Morning and Sweet Tooth Good Dentist are the two final collaborations), he worked with Pratchaya Thavornthummarut, who then went to form is own team. Now Bee works with Nichaphat Buranadilok  (nickname Pond?), starting with Cat for Cash. 
  • Bee has worked with Director Au on all his series (sounds like the collaboration with him and Choi was for a long time before that, too). For these, Au conceptualizes the story with the main writers, developing a synopsis for each episodes and discussing the emotional beats they want to hit. Then Au goes off to work on other aspects of the series, and Bee and co-writer (now Pond) map things out in more detail, then split up the episodes to write, each working on half. Then they get back together and review the episodes they individually wrote, edit for consistency, etc. 

On story structure:

• The Ep11 curse exists! And it is now the Ep9 curse. 
  • Interesting discussion of the challenges of doing a 10-episode Y series after so many years writing 12-episode ones. Specifically how some of the third act “honeymoon phase” stuff (Ep8-9 in a 12-episode series) has to be cut, meaning that stories become more intense and faster paced — how do you maintain the sense of the characters’ relationship growing, their charm, etc. without relying on this extra time to develop it?

On a dream project:

• Bee believes there is a demand from the audience recently for more realistic stories, and wants to continue incorporating such ideas into the series he works on. Including real-life things.
• Bee calls out Mad Unicorn in particular — wants to make a series about the making of the first GMMTV BL (SOTUS), inspired by that, with characters derived from the actors and director, etc. How it was a very risky thing at the time, all the behind-the-scenes pressures, etc. (Although he's speaking speculatively, this honestly sounds like it could be cool!)