Yes. They are going to air it one after another. I read the discussion in pantip.com, they said the first story, Thara Himalaya'd air in September followed by Duangjai Akkanee then Pattapee Lehruk and the final one was Wayupuk Montra.
The stories might be adapted to suit the casts. In novels, all 4 twins are in early 30s but some casts here are under 20.In Thara Himalaya, it's full of bed scenes but as Kimberly is underage, they need to reduce the bed scene. This reason goes to Duangjai Akkanee too. Pantip people said it's full of kiss and bed scenes and the n'ek would be pregnant but Yaya's only 17. They think the pregnancy might be out. (Am I spoiling the content?)
Anyway, I've got a new clip of Duangjai Akkanee. It's just started when other lakorns are gonna finish because Paa Jaew, the director was busy with Sai Soke and Wanida.
Translation
MC: And the second series is starting to shoot with the big scene opening yesterday. The Noproblem company has set up the scene of 4 wheel dirt bike race between Nadech boy and Yaya girl. Yaya who throw away the prim character from Kularb Rainarm and becomes the extreme n’ek in this lakorn got on the bike quickly. Today her senior Suay Rerd Cherd Sod n’ek, Janie also came to cheer as she once risked in motorbike scene too.
Barry: The weather doesn’t support us. It rains. Have you ridden the 4 wheel bike before?
Yaya: Yes.
Barry: Have you ever fall off it?
Yaya: Yes. That day I want to practice riding. I was a bit careless and made a turn too fast. It turned upside down but I could jump off on time.