Alice

I have read some spoilers.

Invalid guy is not Wanwan's boyfriend but brother :)

I am ready to cry because of Pond acting.

I think the second episode will give more characters background and then the main story about the scripts and filmmaking will begin.

Glad you like it :)

Too long? I tried to be more succinct :)

So. Our main character is Talay. His full name is Rawi Letpannya. He was born in September 1998 (I don't remember the exact date). He has parents, 2 siblings and beloved friends. And he got the job of his dreams at the biggest movie company Behind the Film Bangkok. Нe is gay. He doesn't want to start a romantic relationship because he thinks he should make a career first. He likes pink but doesn't wear pink clothes because he thinks it doesn't suit him.
Talay loves his family, friends and work very much, so he wants to leave the parallel world as soon as possible. When he decides that Tun is his portkey he starts chasing him.

Our second main character is Puen. He was born in 1998, but he's younger than Talay. Mom named him as the character of the movie O-Negative. His parents are dead. He has an older sister but she has her own life (she is married and owns a restaurant). I don't remember his full name but he uses Pranon as a pseudonym. He prefers to play in movies rather than series. He is a popular actor but doesn't seem to be a superstar. He is bi and once had a boyfriend. He's a little tsundere, I think, and trying to act cool sometimes. But he's kind of cutie.
Puen loves life in a parallel world. He loves Tun's work, Tun's friends, Tun's house and Tun's parents. He doesn't want to return and this is the reason for the conflict between him and Talay.

In the novel Talay and Puen's relationship is very pleasant. They are both very sweet, soft, charming and a bit flirtatious. In their relationship there is no heteronormativity and toxic masculinity. They are really adorable together.

Next is Tess. His full name is Tatawa Jiracharoeykun. He is the youngest son of the owner of a huge movie company and he's a total asshole. He studies at the university but prefers to play truant. He constantly argues with his father and gets into fights. He seems to be a womanizer and a straight man. He is a big fashionista, likes bright clothes and luxury items.
Tess's attitude is so bad that every time Talay doesn't know something and talks about it, no one is surprised and can only say "As expected of Tess. Nothing matters to him."

Next is Tun. His full name is Pakon Uea-Angkun. He and Tess were friends in elementary school but don't communicate much now. Tun is a screenwriter but he doesn't seem to be very good at it. He has various part-time jobs to find inspiration. Talay begins to pursue him when Tun is on these part-time jobs.
Tess dated girl named Anna. Talay decides that Tun and Tess had a fight because of her and that's why Tun doesn't want to see him. But Anna tells him that the truth is that Tun is in love with Tess. That's the reason why Tun keeps running away. Tun is a little awkward and the scenes with him and Talay are very funny. They manage to meet once but after this Tun leaves the city and on the way back he crashes into a tree and Puen takes his place.

The relationship between Tun and Tess is very complicated. They work together in our world but that only makes things more complicated. Perhaps their story will be made into a separate novel. Not much is known about them right now.

And finally - Paeng. In our world Paeng was an actress but one day she switched bodies with a girl from a parallel world named Fern. Fern went on to be an actress and became a superstar while Paeng became a yoga instructor. Paeng and Puen knew each other in our world. When Puen sees her in Fern's body he senses something and tells Talay about it. Talay decides that Puen and Paeng are portkeys for each other and starts trying to bring them together. But Paeng, like Puen, doesn't want to return. So they came up with a plan. When Talay finds out about it they get into a big fight.

I see how many questions Episode 1 left so I decided to write a little about the characters. This is the information from the novel. I put it under the spoiler because, well, there will be spoilers.
There may be misunderstandings and mistakes in grammar. Sorry for that :)
And be careful if you avoid any kind of spoilers.

"maybe it'll get complex in the later episodes"
Mm, I don't think so. A group of friends write scripts. That's the whole story to be honest.

You're welcome :)

"What's your name?"
"Try to guess. Mom nicknamed me after a character from a movie. It is a movie that was released in the same year I was born."
"Is it just a nickname?"
"Just a nickname."
"Too many choices."
"You and I were born in the same year. The choice narrows down."
"In the year of the movies's release, was it popular?"
"Very popular."
"It's Jack for sure. Because Titanic was popular."
"Random."
"So your name is Rose."
“Talay, stop!”
“Or… You refuse to tell because you mother likes 2499?"
"You..."
“Ai'Dang!”
"Dang, my ass. This movie was released in the differend year."
"Then how am I supposed to know? How can I call you?"
"Up to you."
"Dang, Dang, Daaaaang."
"Please."
“But you refuse to tell me. Besides Dang Bireley is so cool. Have you ever use this sentence?"
"Never."
"I haven't said it yet."
"Say it."
“To be my wife you must endure."
"To be my friend you must endure more."
"Oh come on!"

OK everyone is too fixated on wife things.
It is a quote from the movie Dang Bireley's and Young Gangsters (2499 Gangsters Rule the City). I translated the dialogue from Chapter 7 of the novel where it is mentioned. This is dialogue only and the translation is very rough.
(Sorry for the mistakes, English is not my native language.)

No, I read it in Thai. Although earlier there were about 8 chapters in English on wattpad, I think it's been deleted now.

In the novel pink is his favorite color.

Tun is still real Tun, they haven't switched bodies yet. And Tun doesn't know that Tess isn't real Tess now.
In the second episode Tun and Puen will swich bodies and Puen and Talay will begin to communicate, get to know each other and fall in love.

Tun is still real Tun, they haven't switched bodies yet. When they switch Talay will be the first to know.
Nobody knows that Tess is a different person now.
Tun avoiding Tess because he is in love with him.

In the novel story only follows Puen and Talay relationship.

Yes, he is secretly in love with Tess.

And I suddenly realized.
The design of the series is in pink tones because it is Talay favorite color and pink led him to Puen. (I f I understand correctly.)

I read 8 chapters in English on wattpad but it seems to have been deleted already. You can try searching there.