Once childhood fiancés, Akina and Sousuke had their engagement broken off when Akina's family faced financial ruin. Rather than lament the loss of a secure future, Akina embraced her independence, built a career on her own merit, and thrived in her professional life. Her carefully reconstructed world is thrown into disarray when her company is acquired by a larger corporation, and she discovers that Sousuke now works there as a high-ranking executive. Sousuke, a handsome and capable heir, has never stopped caring for Akina, but his feelings manifest in a prickly, tsundere demeanor—he is outwardly cold and argumentative while clearly still smitten. Akina, equally stubborn and proud, matches his defensiveness with her own fierce independence. Their coworkers quickly notice the charged atmosphere between them, and what follows is a workplace romantic comedy built on mutual attraction, deep-seated pride, and an inability to speak honestly about their emotions. After an early breakthrough where they finally confess their lingering feelings, a new complication emerges in the form of a current fiancée arranged for Sousuke, testing their still-fragile relationship. The narrative follows their journey as they navigate lingering misunderstandings, outside pressures, and their own stubborn hearts, all while trying to prove that their connection is strong enough to overcome the past.