My billionaire roommate is the Demon King

Episode 1

Emma is one week unemployed and one rent payment away from sleeping on the street, so when a gorgeous stranger offers to take her spare room, she's ready to overlook every flaw—the creaky walls, the finicky hot water, the nosy neighbor. Then he hands over a full year's rent upfront. His reasoning? He doesn't like paying twice.

He has just one rule: never open his bedroom door. Ever. Emma jokes that he must be a spy or a pervert. He says neither—something much worse. She laughs it off. She really should have listened.

Episode 2

Living with Lucian means adjusting to some odd habits. He swaps out her milk for protein powder meant for a wolf, and he moves through the apartment with unsettling quiet. Emma fires back with her own house rules: no strange noises at night, no turning the fridge into a horror movie, no scaring the neighbors.

He answers with three of his own—never enter his room, never ask where he goes after sunset, and if he tells her to run, she runs. When she secretly snaps a photo of him, he already knows. He can hear her heartbeat. Somewhere, a target is confirmed: the devil has found his anchor.

Episode 3

Emma is starting to think her roommate is haunted—or that she's losing her mind. Who looks that perfect before coffee? He credits 900 years of practice. She assumes he's joking about the vampire thing. He isn't.

Then a supposed building inspection arrives at the wrong apartment, looking for someone, not something. Lucian tells Emma to step behind him. In seconds, intruders are down, and one of them calls him the devil king. He warns her to close her eyes so this won't be her last memory of him. The order goes out: eliminate the devil king.

Episode 4

Strangers urge Emma to come with them, insisting that staying with Lucian will get her killed. Even Lucian tells her that if she leaves now, she'll live. Emma points out the obvious—they broke into her apartment and attacked him first. She wants an explanation, not another knife pointed her way.

Then something impossible happens: a soul contract activates. If she dies, he dies; if he dies, she dies. Emma groans that this is the worst lease agreement ever. But a voice warns this is only the beginning. The anchor has awakened, and Protocol Black is initiated.

Episode 5

Emma refuses to spend her life magically handcuffed to a billionaire demon and storms out—only to collapse within seconds. It turns out distance from Lucian physically hurts her. When he touches her, she feels better. Awkwardly, intimately, unavoidably.

Since her room is now unlivable, he offers his—the only untouched space—even though he once banned her from it. Circumstances changed, he says. She doesn't trust him, but she trusts the contract. Then she notices a portrait and asks who the woman is. His answer is quiet: someone he failed to save.

Episode 6

An investigator arrives with questions about the break-in, and the security footage caught more than intruders. When asked what her relationship is to Lucian, Emma blurts out that he's her boyfriend. Now they need to sell it.

Cue an emergency lesson in fake dating: personal space doesn't exist, hold the waist like it's not a live bomb, and get the timeline straight. He says three days; she stretches it to months. Somehow they survive the questioning. Afterward, a watcher confirms the anchor has accepted proximity and orders them to proceed to phase two. Someone is tracking every move they make.

Episode 7

Breakfast is aggressive—Lucian calls it crispy, Emma calls it a fire hazard. He insists he's survived worse in 900 years, then rushes off to his actual day job. Emma discovers exactly what that means when she follows him: he's the CEO of a massive company. Not a job—a whole empire. He stopped keeping up with pop culture around 1824, so the Batman reference sails right over his head.

At the office, his assistant hands Emma an unlimited card—a privilege only one other person ever had, someone who died a very long time ago.

Episode 8

Lucian drags Emma to a glittering billionaire party, and she realizes she's wildly underdressed. He calls her distracting, which she takes as flirting from a 900-year-old demon. He admits he tricked her into coming, because otherwise she'd have said no.

Inside, everyone knows his name—and one woman clearly knew him long before humans discovered electricity. She asks if Emma is his replacement. He answers simply: he chooses her. A warning ripples through the room. The devil king chose a human. Let's see how long she survives. Welcome to our world, Emma.

Episode 9

At the demon gathering, Emma notes that everyone either hates her or wants to eat her—some, both. Tonight the devil king's companion must pass the blood oath. If she's worthy, nothing happens. If she isn't, she'll know.

Emma drinks it anyway, not for them but because she's tired of everyone deciding who she is. The mark flares to life. A demon gasps that it recognized her—she isn't just the anchor. She's the queen. The prophecy has awakened, and the room goes cold.

Episode 10

The queen's mark shouldn't be possible on a human, and it's awakening everything inside Lucian. He tries to push Emma away, ordering her to run before he loses control and can't stop himself.

She refuses. She looks straight at him and tells him he's not a monster—he's the person who saved her, who ate her terrible cooking, who pretends not to care but always does. She's afraid, but more afraid of losing him. The beast calms. No one has ever done that. Then a warning lands: the ones who want her dead are coming.