My billionaire roommate is the Demon King

Struggling artist Emma believes her financial troubles are solved when an exceptionally attractive tenant covers an entire year's rent in cash, asking only for total privacy behind locked doors. Her curiosity soon leads to a shocking revelation: her wealthy flatmate is an ancient demon sovereign concealing his otherworldly essence beneath corporate status. When an accidental magical mishap binds their spirits in a mystical soul contract, the duo must pretend to be passionate partners in public. While their simulated romance gradually ignites genuine affection, Emma begins uncovering mystical truths about her own lineage that defy mortal understanding.