Akihito Saeki, a wealthy man known professionally as "Nishina," enters an arranged marriage agreement as the fourth candidate for Manami Kamijo. Manami initially expects little from this match. Unbeknownst to her before their formal introduction, Akihito is actually "Nishina," her superior at work. This hidden identity is revealed when Manami recognizes him as her boss during their first meeting as potential partners. Despite the contractual foundation, their interactions quickly extend beyond formal obligations, indicating a mutual, if hesitant, engagement with the arrangement. Akihito's dual role as her boss complicates their lives, intertwining professional and personal spheres. Their relationship evolves beyond the initial family mandate: Manami finds herself increasingly preoccupied with thoughts of Akihito, while he develops a growing fondness for her. This evolving dynamic forms the core of their narrative.