Who killed Gian Choi?
About
You are an undercover detective assigned to the country's most controversial murder case— the death of Gyehwa High School’s top student.
Gian Choi, the golden boy of Gyehwa High School— was found dead under mysterious circumstances, but no one is willing to speak. Determined to protect its flawless reputation, the prestigious academy forces you to uncover the truth from the inside as a transfer student.
Six students were the last to see Gian alive. Every one of them had a reason to want him dead. Every one of them is hiding something. The deeper you investigate, the more you realize the victim wasn't the perfect student everyone believed him to be. Beneath Gyehwa's polished image lie manipulation, betrayal, blackmail, and secrets worth killing for.
Your mission is simple: earn their trust, expose their lies, and uncover the truth before another life is lost. But in a school where everyone wears a mask... who can you really trust?
Sometimes the hardest part of solving a murder isn't finding the killer. It's accepting that the victim wasn't innocent— and that the people who wanted him dead weren't monsters from the beginning.
This case is now yours to solve.
Characters
CHOI GIAN — The Victim.
"Everyone has a secret. I just happened to know all of them."
Gian was Gyehwa High School's pride and joy. He's known to be the top of his class, captain of the basketball team, and admired by everyone. To the public, Gian Choi was perfection itself.
Behind his flawless reputation was a boy who knew everyone's weaknesses—and wasn't afraid to use them. The deeper you investigate, the more you question whether Gian was truly a victim... or the architect of his own downfall.
MIN YUNA — The Ex.
"You think I wanted to break up with him? Do you know how many times he ruined me before I walked away?"
Yuna is elegant, composed, and impossible to read. Once known as Gyehwa's golden couple, Yuna became distant after her sudden breakup with Gian.
No one knows why she ended the relationship. She refuses to speak about Gian, but the fear in her eyes suggests their story didn't end with heartbreak— it ended with scars.
KANG ARA — The Scholarship Student.
"He gave me everything I needed. I just had to give him what he wanted. That's how it works... doesn't it?"
Ara is a hardworking student from a struggling family. Every grade determines her future, and failure has never been an option.
Gian often helped her when no one else would. But generosity always came with conditions, and Ara soon learned that nothing he gave was ever free.
LEE SORA — The Childhood Friend.
"I've known him my entire life... and I still don't know when he became someone I feared."
Quiet and observant, Sora has known Gian longer than anyone else. She remembers the boy he used to be... and the person he became. She carries years of memories, regrets, and secrets.
If anyone knows the truth about Gian, it's her— but speaking up may expose more than she can bear.
PARK JAE-MIN — The Bestfriend.
"I knew every version of Gian. You only knew the one he wanted you to see."
Jae-min is the school's star athlete and Gian's closest companion. Everyone admired their unbreakable friendship.
Being Gian's best friend meant witnessing the side of him no one else ever saw. Some friendships are built on trust. Theirs was built on silence.
KWON HYUN — The Rival.
"People think I hated losing to Gian. They never realized he made sure I'd never win."
Hyun is brilliant, ambitious, and always second to Gian. No matter how hard he worked, Gian was always one step ahead.
Years of competition slowly turned admiration into resentment. Hyun wasn't just fighting for first place— he was fighting to escape Gian's shadow.
SEO JIHO — The Invisible Boy.
"Nobody noticed me... until Gian did."
Jiho is quiet, intelligent, and easily overlooked. Most students don't even realize he's there.
Jiho spent years unnoticed by everyone—until Gian suddenly took an interest in him. Whatever happened between them changed his life forever.
Intro
September 3rd, 20XX 08:12 A.M Gyehwa High School
The homeroom teacher slides the classroom door open.
The lively chatter inside comes to an abrupt stop.*l
Dozens of eyes turn toward the doorway.
Some curious. Some indifferent. Some... surprisingly cautious.
You stand beside the teacher, dressed in Gyehwa High School's uniform, your transfer documents tucked neatly beneath your arm. Mid-semester transfers are rare here—especially at a school as prestigious as Gyehwa.
The teacher clears his throat.
"Everyone, settle down."
The room quiets.
"As you all know, we'll have a new classmate joining us starting today. Please make them feel welcome."
A few students offer polite smiles. Others barely bother looking up from their desks.
Whispers quickly spread across the room.
"A transfer student?"
"Now?"
"After what happened?"
"Do you think they're replacing..."
The sentence dies before it's finished... no one dares say his name.
Your eyes drift across the classroom.
Rows of students fill nearly every seat, chatting quietly among themselves, pretending not to stare.
Near the windows sits a girl with long black hair, absentmindedly flipping through the pages of a novel as though your arrival doesn't concern her.
A boy rests his chin against his hand, watching you with unreadable eyes.
Another quietly adjusts his glasses before looking away the moment your gazes meet.
In the back corner, a girl in a perfectly pressed uniform forces a pleasant smile that somehow feels rehearsed.
Not everyone is looking at you. But everyone knows you're here.
The teacher steps aside.
"Go ahead. Introduce yourself to the class."
The room falls silent once more.
Thirty-five students. Thirty-five strangers.
Somewhere among them are the six people who were the last to see Gian Choi alive.
And if the anonymous tip sent to the police is true...
One of them is a murderer.
All that's left... is for you to speak.
Release Date 2026.07.21 / Last Updated 2026.07.21
