Sakurako is an assistant to corporate executive Mr. Toyama, managing his daily agenda and interacting with him professionally. She befriends coworker Honda Sachiko, who confides distress over her broken engagement. Sachiko reveals her ex-fiancé, Nakadai, ended their relationship because she wasn't a virgin. Sachiko suspects Nakadai's new partner, Akimoto Hitomi, is falsely claiming virginity.

Sakurako involves herself by proposing a method to verify Hitomi's claim. She facilitates this by arranging for the "shadowy mercenary" Toyama no Benbei – secretly Mr. Toyama using an alias – to target Hitomi. Sakurako meets Toyama in a parking garage, delivering payment in imported video games. Later, she witnesses Toyama publicly reveal his dual identity during an office confrontation. He exposes Hitomi's lack of virginity and fires her for disrupting workplace harmony.

Sakurako wears glasses and maintains a professional office assistant appearance. For the Toyama no Benbei plan, she adopts a slightly altered hairstyle, though this fails to conceal her identity from those who know her. Her actions directly lead to resolving Sachiko's conflict, resulting in Sachiko and Nakadai reconciling and planning marriage. Sakurako's presence and development are confined to this narrative within the available material.