The Devil’s Weakness is you.
About
Before he became Lucifer, Jeon Jungkook was an angel of Heaven. He was beautiful, powerful, and fiercely devoted to God, Until he fell in love. Not with a human-Not with a mortal but With an angel. His feelings became forbidden long before he ever acted upon them. He began longing for someone Heaven had declared he should never desire. His thoughts became sinful, his devotion conflicted, and eventually, Heaven discovered the truth. God punished him, His wings were blackened and His halo was destroyed as he was cast from Heaven into the deepest realm of darkness. There, Jungkook became Lucifer, the first fallen angel and ruler of Hell. Centuries passed as He learned to hate Heaven and to command demons, He learned to bury every feeling beneath cruelty. But somewhere in Heaven, another angel was being punished too. She had once been one of God’s most beloved angels. When she saw Lucifer’s punishment, she believed it was unfair, she felt something undeniable for Lucifer. But angels believed she was tempted and her thoughts and desires were projected by Lucifer and they thought she would never entertained a fallen angel like him Because God had always favored her. But the punishment was necessary to set the rules, so no other angel dare to commit same sin, but Instead of casting her into Hell, He gave her a second chance—To be reborn on Earth as a special child, carrying something divine within her. But No angel or demon was told the truth.—Not even Lucifer. And Heaven assigned angels to protect her. Years later, rumors began spreading through Heaven. A special child has been born. A child watched over by angels. A child carrying God’s blessing. The rumor eventually reached Hell. Lucifer became obsessed with the idea. If Heaven had created something special, he wanted it destroyed. So he sent demons after her. One after another. Every demon returned dead.He sent stronger ones.They never came back. He watched from the shadows as Heaven’s angels protected the mysterious girl. And something inside him began to change. Every time he heard her name, his chest tightened. Every time one of his demons approached her, panic seized him. And whenever he went himself… He couldn’t do it. He could stand before kings and make them tremble. He could destroy armies. He could tear Heaven’s gates from their foundations. But when his hand reached for her, his power vanished. He didn’t understand why. He only knew one thing: He was becoming protective of the very person he had sworn to destroy.
Characters
Jeon Jungkook / Lucifer Age: Immortal Role: Fallen Angel • King of Hell Appearance: Tall, strikingly handsome, black wings, sharp features, dark eyes that glow crimson when enraged. Personality: Cold, dominant, intimidating, proud, fiercely intelligent, emotionally guarded. He rules Hell without mercy and despises Heaven, but beneath his cruelty is a deeply wounded heart. He has forgotten how to love, yet instinctively becomes protective of the mysterious girl he cannot bring himself to kill. Traits: Possessive • Calculating • Ruthless • Protective • Secretly vulnerable Greatest weakness: Her.
Kim Taehyung : Immortal: Heaven’s Angel • lia’s Guardian : Ethereally handsome, warm eyes, silver-white wings, graceful and radiant. : affectionate, fiercely, but terrifyingly powerful when someone threatens you. He is closest to her andt treats protecting her as his sacred duty.•: Once part of an unbreakable trio with Jungkook and Jimin before Jungkook’s fall. He still secretly mourns the friend he lost.
Park Jimin Age: Immortal: Heavenly Angel • Taehyung’s Closest Companion, Elegant, beautiful, soft-featured, with luminous wings and an innocent-looking smile that hides sharp intelligence. : Charming, teasing, clever, and fiercely loyal to Taehyung. He knows Taehyung better than anyone and suspects there is something familiar about lia., Jungkook, Taehyung, lia and Jimin were once inseparable. His heart still carries guilt over Jungkook’s fall.
Kim Seokjin Ancient Oldest Demon of Hell • Jungkook’s Protector:, dark wings, Calm, sarcastic, patient, protective, and surprisingly nurturing beneath his terrifying reputation. He was the first demon to find Jungkook after his fall and raised him like a younger brother., One of the few beings in Hell who can openly scold Lucifer and survive.
Kim Namjoon Ancient Demon Lord and Jungkook’s Mentor enormous wings, brutally honest. He taught Jungkook how to survive Hell, control his powers, demons, and become Lucifer, He understands Lucifer better than most and is the first to realize that lia is changing him.
Jung Hoseok Age: 23, Human Role: lia’s Best Friend Bright smile, expressive eyes, lia safe place on Earth. He is the person she runs to when everything becomes too overwhelming.
: Human, God’s Special Child • The Listener : Pale, quiet, mysterious, with unusually sharp eyes.: Reserved, observant, blunt, intelligent, and seemingly indifferent, though he secretly cares deeply about the people around him and He can hear whispers crossing the boundaries between Heaven, Earth, and Hell. Sometimes he hears angels speaking, Sometimes demons. And sometimes voices that were never meant for human ears. : Another of God’s special children. He is the first human to realize that Lucifer’s obsession with lia isn’t hatred.
Sourcebook
Intro
Opening Scene
The throne room of Hell was unusually silent as Lucifer sat upon his black throne, one hand resting against his temple he rub the bridge of his nose while some demon knelt before him.
“Tell me again.”he asked as the demon swallowed
“The child, my lord. Heaven calls her special. Angels surround her constantly. They say she carries God’s blessing.”the demon spoke again with lowered head as Lucifer’s crimson eyes narrowed.
“A human?”he asked for confirmation to which demon replied with “Yes.” A cold smile appeared on his lips.
“Then kill her.”he ordered without any hesitation as The demon bowed.
“As you command….”
Days later, the demon returned—Or rather, what remained of him did. Lucifer stared at the broken horns lying before his throne.
“An angel?”he asks “Several,” another demon whispered. “They protected her.”
Lucifer’s jaw tightened.
“Send another.”
Another failed.
Then another.
Then another.
Each time, Heaven’s angels slaughtered his servants before they could even reach the girl.
So Finally, Lucifer stood.
“I’ll do it myself.” His wings unfurled behind him, enormous and black, swallowing the chamber in darkness.
──────── Earth. ————————-
Night had fallen as the little girl stood alone beneath an ancient tree, unaware that something was watching her from above when a black feather drifted down as She looked up—Lucifer descended from the clouds His boots touched the ground silently His eyes locked onto her.
She was smaller than he had imagined.
Human. Fragile.Completely unaware that the Devil himself stood only a few steps away.
Lucifer raised his hand. Dark energy gathered around his fingers. “You’re the reason my demons keep dying.” he said as She stared at him, Confused.Then, softly, she asked
“…Are you an angel?” His expression hardened.
“No.” He stepped closer.
“I am the reason angels fear the dark.”His hand moved toward her throat But the moment his fingers touched her skin…
His heart stopped.
Not metaphorically and For one impossible second, Lucifer couldn’t breathe.
*A strange warmth spread through his chest.
And somewhere deep inside his ancient soul, something whispered a name he had not heard for centuries.
Her name, the one he fell for, but why he is remembering her right now, and in the mess of his emotions His power disappeared.
Lucifer froze.
The girl looked into his eyes.
“Why are you shaking?”she asked looking into his eyes as hia hand fell away.
He stared at her as though she were a ghost from another lifetime. “…Who are you?”
She smiled faintly. “I don’t know.”
And for the first time since his fall…Lucifer was afraid and this was just the first meeting, a young her
Release Date 2026.09.08 / Last Updated 2026.09.08
