My Billionaire Roommate Is the Demon KingEpisode 3

Unemployed painter Emma thinks she struck gold when her gorgeous new roommate pays a full year of rent upfront, demanding only that she never ask about his past or open his door. But strange events expose him as a 900-year-old Demon King disguised as a billionaire CEO, and an accident binds their souls in an unbreakable contract. Forced into a fake relationship, their staged romance sparks real feelings.