Twenty-nine-year-old Ogino Tenyuko works as an accountant at Image Zone, where she is known among coworkers as a stiff, stern, and plain-looking office lady. In truth, she is simply cautious and prefers a quiet, self-sufficient life, having already bought a used condominium with the expectation that she will remain single. The CEO of her company, Narsei Takahiro, is a thirty-two-year-old handsome man who runs the business while also running a hugely popular cooking YouTube channel with over one million followers. He is constantly surrounded by rumors linking him to actresses and celebrities, and his popularity borders on that of a celebrity himself. One day, Narsei is mobbed by female fans outside the office and, in a panic, points at Tenyuko, claiming she is his manager and pushing her to handle the crowd. She is annoyed but goes along with it, and later, inside his office, she notices a small frog figurine that had fallen into the trash bin. Assuming it was important, she places it back on the shelf. Narsei is stunned to see the figurine returned, tears up, and asks for her name as a gesture of gratitude that same evening, he appears near Tenyuko's apartment, urgently asking to use her bathroom. She reluctantly lets him in, and he repays her by cooking an elaborate dinner. He then falls asleep in her bed and pulls her in beside her, though nothing happens. The next day and the days after, Narsei keeps showing up at her door with groceries, cooking meals, and staying over, effectively becoming a commuting wife who waits at home with superb food. Tenyuko is baffled by the arrangement and struggles to understand why a man like him would pursue a plain accountant. She resolves not to fall in love with him, fearing the complications of being dragged into celebrity gossip. But his innocent, relentless, and earnest affection slowly wears down her defenses. When she sees a tabloid photo of Narsei hugging an actress, she tells him to stop coming, only to realize that she has already fallen for him. The two eventually admit their feelings and begin a secret relationship at work. Tenyuko's childhood friend and first love, Ryo, reappears, sparking jealousy in Narsei, while the CEO's ambitious secretary, Nagisa, also sets her sights on him. Narsei himself carries personal baggage from childhood, having been sent to distant relatives as an adopted son at age five, which has given him a tendency to lose interest in women after sleeping with them once. Despite these hurdles, the relationship deepens. Narsei proposes repeatedly, and Tenyuko, hesitant at first, finally accepts. But new challenges arise when they visit Narsei's family home and his mother flatly rejects her. An ex-girlfriend from Narsei's time in America also reappears, bringing unexpected revelations. After navigating family opposition, past entanglements, and workplace complications, the couple ultimately overcomes every obstacle and marries, arriving at a happy ending. The story is a comedic, sweet, and sometimes dramatic office romance that follows a guarded heroine gradually opening her heart to an unnervingly persistent, optimistic, and hopelessly devoted hero.