International fans have been asking about the script book — and unfortunately, no online bookstore ships it overseas. I can’t photograph the pages for copyright reasons either.
But I read it cover to cover, and here’s what’s in it.
Director Yoo Soo-min’s Literary Blueprint
Su-ho and Si-eun as Demian and Sinclair
Director Yoo Soo-min revealed he conceptualized Su-ho and Si-eun’s relationship based on Hermann Hesse’s Demian — specifically the dynamic between Sinclair and the mysterious older figure who awakens him.
He had even planned to include a line during Su-ho’s accidental delivery to Si-eun’s house:
“What would have happened to that boy’s world if Demian had never come to find Sinclair?”
It was cut from the final version. But the framework stayed. Su-ho as the person who pulls Si-eun out of his isolated, academic shell and into actual human connection — that’s not incidental. That was the director’s foundational concept.
Si-eun’s Breakdown and Evangelion
The director wrote Si-eun’s violent outburst against Yeong-bin’s crew while watching Shinji’s breakdown scenes from Evangelion.
Once you know this, the parallel is hard to unsee. Both are isolated boys trapped inside themselves, dealing with a loneliness that has nowhere to go. Both have moments where the suppressed emotion finally cracks open into something overwhelming. Yes, and we all noted that Shinji’s first love is Kaworu — and Si-eun’s first love is officially Su-ho.
The Webtoon Transfer
The natural chemistry between Baku and Si-eun from the original webtoon was deliberately adapted for Su-ho and Si-eun’s dynamic in the drama. Their relationship wasn’t built from scratch — it was transplanted from an already established emotional foundation in the source material.
Deleted Scenes
The Club Scene — What Yeong-bin’s Crew Originally Said
The scene where Yeong-bin’s crew talks about Si-eun had an earlier version. Jung-chan’s original line:
“Lately that bastard Yeon Si-eun seems really crazy. What’s with that fucking pen… But why does Ahn Su-ho keep covering for that bastard? Are they dating?”
This was adapted from a webtoon scene where Beom-seok secretly photographs Su-ho and Si-eun walking together and asks the same question. Both versions were cut — but even the bullies were clocking the intensity between them.
Yeong-i Confronts Beom-seok
After Su-ho falls into a coma, Yeong-i runs to Beom-seok’s house and physically blocks the car. Beom-seok jumps out to confront her — and according to the script, he slaps her.
This scene is referenced but the full version didn’t make the final cut.
How Each Actor Prepared — and Why It Fits Perfectly
Park Ji-hoon went to study cafes and analyzed the script line by line, factoring in how his scene partners would deliver their lines.
Choi Hyun-wook read all his dialogue out loud and grasped the overall flow.
Hong Kyung casually read through everything and went with what felt right.
Si-eun’s actor preparing like Si-eun. Su-ho’s actor preparing like Su-ho. Beom-seok’s actor preparing like Beom-seok. Nobody planned this, apparently.
The Real Tears
In Episode 7 — when Su-ho visits Si-eun at home after fighting in his place — Choi Hyun-wook cried actual tears during filming.
And Hong Kyung said something that stuck with me:
“I didn’t realize how much Si-eun and Su-ho truly loved each other until I read the script book. They really were so devoted to each other.”
Beom-seok’s actor. Saying this. About the two people Beom-seok lost.
The Rolling Paper Messages
At the end of filming, the actors wrote messages to each other in character.
To Su-ho:
Yeong-i: “Hey, wake up, idiot! I’m making money. Your noona will buy you meat. Grandma and I are waiting. Wake up when it’s time, you bastard.”
Beom-seok: “I really admired you. I loved you so much. I’m sorry. I’m really sorry. Su-ho…”
Si-eun: “I want to go back to that time.”
Su-ho to himself: “I think I’m going to wake up.”
To Si-eun:
Su-ho: “You’re doing well on your own, right? — Guardian Angel Su-ho —”
Beom-seok: “Si-eun… I’m sorry. I’m really sorry.”
Why Su-ho Said “Tell a Teacher”
Choi Hyun-wook addressed the scene where Su-ho refuses to help when Beom-seok asks him to rescue Si-eun:
“The reason was really simple — they genuinely weren’t that close yet. He was annoyed at being woken up, he had a part-time job later, and he was thinking ‘do I really need to go all the way there?’ It was a series of practical thoughts.”
Su-ho wasn’t being cold. He was being accurate. They weren’t close yet. That’s all.
The KakaoTalk Messages Nobody Could Read
This one isn’t from the script book, but fans have been asking — so here’s the translation of the Si-eun and Su-ho chat that flashes briefly on screen:
Su-ho: “Where are you? Going to eat first?”
Si-eun: “Yeah, you were sleeping so I came first with Beom-seok”
Su-ho: “Wow… traitor… stay right there, don’t move, I’m rushing over”
Si-eun: “I just left though?”
Su-ho: “Ah shit, wait!!!”
Three boys who were, for about a month, just friends who ate together and sent each other annoyed texts.
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