In Sapporo, twenty-nine-year-old Tsubaki Takase works in sales and has been nursing a secret crush on her colleague and superior, Azuma Ryuhei, for three years. Tsubaki is shy and inexperienced with romance, and she has remained a virgin well into her late twenties. Azuma, on the other hand, is known around the office as a playboy who never turns anyone down. Frustrated by her inability to move beyond the "friend" zone, Tsubaki gathers her courage and impulsively invites Azuma to a hotel. To her surprise, he refuses to sleep with her, revealing a hidden complexity beneath his carefree exterior.

The story follows Tsubaki as she continues to wrestle with her feelings while Azuma, despite his reputation, struggles with his own unresolved feelings. A new complication arises when Tsubaki attends a marriage party organized by a friend and matches with Sano, the heir to a major supermarket chain. Sano treats her kindly and seems genuinely interested, but Tsubaki’s heart remains torn: she cannot stop thinking about Azuma, who is both a "playboy" and a hardworking, earnest boss. As tensions mount, Azuma grows jealous of Sano, misunderstandings come and go, and eventually Azuma confesses his long-hidden love for Tsubaki.

Once they become a couple, the story shifts into a celebration of their mutual affection. Tsubaki, finally able to embrace her romantic side, asks Azuma to teach her everything about love and intimacy. The narrative concludes with a heartwarming resolution, wrapping up their office romance on a note of mutual growth and happiness. The supporting cast includes Tsubaki’s friend who nudges her toward the marriage party, and Sano, who acts as a catalyst for Azuma’s jealousy and eventual declaration. The setting—Sapporo, with its distinctive northern Japanese atmosphere—adds a quiet, grounded backdrop to the emotional arcs of the two leads.