My billionaire roommate is the Demon King

My billionaire roommate is the Demon King Episode Guide

1. EP 1: The Rule About the Door

   Emma Carter struggles to carry her things down the apartment hallway until Lucien Black catches her. Lucien hands over a check that covers an entire year of rent upfront. Emma tells him her only house rule is not to blow up the building. Lucien gives his own strict demand: she must never open his bedroom door. Late at night, curiosity takes over. Emma pushes the door open and catches Lucien with black veins on his neck and glowing red demon eyes.

2. EP 2: The Devil's Anchor

   Emma opens the refrigerator in the morning and finds raw, bloody meat instead of milk. She confronts her roommate in the kitchen, leading to a new set of rules from him. Outside, a passing dog cowers in terror as Lucien walks by. Emma secretly tries taking a photo of him, but he hears her heartbeat. Across the street, an armed hunter watches them through binoculars and sends a report to his superiors, confirming that the devil has found his anchor.

3. EP 3: The True Form

   Emma looks up strange phenomena on her computer while Lucian makes coffee. He claims he has practiced brewing for 900 years. Two demon hunters disguised as home inspectors ring the doorbell. Lucian stops a flying blade aimed at Emma with his bare hands. The lead hunter presses a blade against his chest, causing Lucian to snap. Black horns and dark wings erupt from his body. Lucian tells Emma to close her eyes while he gathers dark power to fight.

4. EP 4: Bound by Soul

   A hostile attacker in a Metro Security uniform orders Emma to leave. Emma defends her roommate instead. The attacker tosses a metal disc under Emma, lighting up a golden seal that throws her to the ground in pain. Lucian takes her hand, sparking an explosion of gold light and dark smoke. The attacker realizes a soul contract has activated between them, tying their lives together. He calls in an alert for Protocol Black before fleeing the damaged apartment.

5. EP 5: The Portrait on the Wall

   Emma grabs her luggage and tries to leave the apartment. Her demon roommate warns that she will last only twenty seconds away from him. Pain seizes her chest on the street outside. Her roommate rushes out and takes her hand, stopping the agony. Back inside, he hands Emma the key to his private bedroom. Emma opens the door and spots a painting of an ancient noblewoman on the wall. The woman looks identical to her, but her roommate explains he failed to save her.

6. EP 6: Practicing Proximity

   The property manager stops by to investigate the broken door. Emma tells him that her roommate is actually her boyfriend. In the kitchen, Emma gives him a quick crash course on acting like a couple, placing his hands on her waist. They manage to fool the manager. Outside, an operative in a black SUV takes photos and reports that the anchor has accepted proximity. Lucian senses the surveillance, grabs Emma's hand, and the soul marks on their skin light up.

7. EP 7: The Black Card

   Emma prepares breakfast while Lucien receives an urgent board meeting notice. Emma spots a forgotten document and bicycles to the Black Group corporate tower. She finds Lucien surrounded by employees, realizing he commands an enormous company. Lucien wipes cooking flour from Emma's cheek right in front of the board members. His executive assistant then presents Emma with an unlimited black card. The assistant reveals that the only woman who previously held the card died long ago.

8. EP 8: The Charity Gala

   Emma wears a black gown as Lucius brings her to the Black Group Charity Gala. Paparazzi crowd their limousine on the red carpet. Inside the banquet hall, demon nobles gather. Lucius's former lover, Lilith, confronts them and asks if Emma is replacing her. Lucius grabs Emma's hand and announces to the entire room that he chooses her. Lilith issues a chilling warning to Emma, telling her to prepare to lose everything in this dangerous demon world.

9. EP 9: The Blood Oath

   Hostile glances follow Emma and the Demon King across a grand ballroom. A woman in a red gown steps forward with a chalice of swirling dark mist, demanding Emma drink the Blood Oath. The Demon King orders her to stop, but Emma drinks it herself. Golden light flares from Emma's skin, burning a glowing crowned raven crest onto her arm. The demoness declares Emma is the Queen. In the shadows, a hooded figure watches the prophecy awaken.

10. EP 10: Calming the Beast

    Ballroom guests stare at the Queen's mark on Emma's arm. Lucian tries to pull her away, but a woman in red warns that the mark will awaken his demonic side. Black veins spread across Lucian's skin, and he transforms into a winged beast. Emma steps forward, clasps his hand, and speaks to him with trust. The monster calms down and returns to his normal form. Lightning suddenly cracks through the room, opening a dimensional rift as Lucian warns enemies have arrived.

Characters

• Emma Carter

  Struggling painter and roommate

  Emma rents out her spare room to make rent, only to end up bound by an ancient soul contract to a demon.

• Lucien Black

  Demon King and CEO

  Lucien is a 900-year-old Demon King disguised as a billionaire executive who protects Emma while concealing secrets from his past.

• Lilith

  Demon noble

  Lilith is Lucien's former lover who confronts Emma at the charity gala and warns her about the demon world.

Memorable Lines

Official Source

Frequently Asked Questions

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