Hinata, a new office employee who has always been uneasy around men, finds herself cornered during overtime by a lecherous section chief. She is rescued by Inokari, a blunt and work-focused senior colleague. Despite his cold exterior, Inokari’s kindness draws Hinata in. Soon she discovers that their connection goes beyond the ordinary: every night at nine o’clock, Inokari is overtaken by the memories and desires of a past life, transforming into an almost feral beast driven by an uncontrollable need. Hinata, instead of being frightened, chooses to help him through these episodes, and her compassion deepens into genuine affection even as Inokari struggles to restrain himself for her sake.

The story unfolds in a contemporary office setting where ordinary workplace interactions are complicated by supernatural forces. The section chief, who was the aggressor at the company welcome party, begins to regain his own past-life memories and grows obsessed with Hinata. He conspires with allies to kidnap her, and Inokari must devise an unconventional and intimate plan to rescue her. Meanwhile, an unexpected encounter with an ex-boyfriend from high school, whom Hinata had hoped never to see again, adds further tension to her already tangled work and romantic life. Through these crises, Hinata’s bond with Inokari strengthens as they navigate the intertwining of their present-day lives and the unresolved karma of their previous existence, leading to a passionate office romance charged with supernatural stakes.