Adaptation of the short story written by Manta Aisora for the first issue of GA Bunko magazine.

The story follows Benio Haikara-san Hanamura, who lost her mother when she was very young and has been raised by her father, a high-ranking official in the Japanese army. As a result, she has grown into a tomboy. Contrary to traditional Japanese notions of femininity, she studies kendo, drinks sake, dresses in often outlandish-looking Western fashions instead of the traditional kimono, and is not as interested in housework as she is in literature. She also rejects the idea of arranged marriages and believes in a woman's right to a career and to marry for love. (Source: ANN)

After watching a volleyball match on TV where the Little Giant of Karasuno High School helps his team secure a hard-fought victory, young and impressionable Shouyou Hinata begins to play the sport in hopes that he too can soar high one day. Now enrolled at the same school as his idol, he attempts to join the volleyball team despite his short stature. Unfortunately, upon his arrival, Hinata locks eyes with King of the Court Tobio Kageyama—a genius setter whom he had once suffered a bitter defeat to in middle school. Their unfriendly introduction and subsequent rivalry forces the rest of the Karasuno team to bar both of them from joining the club until they can learn to work together as teammates. Though reluctant to cooperate, their desire to play volleyball causes them to return with a proposal that will show the other members that they are capable of teamwork. As the two freshmen form an odd setter-and-ace relationship, an old rival school invites Karasuno for practice matches, reigniting competition between the two schools once more.

Set in the 1920s, Haikara-san ga Tooru is the story of the high-spirited tomboy Benio and her relationship with a handsome half-German soldier named Shinobu. Benio is a very outgoing and athletic girl with firm ideas about being able to live her life as she wants to. When she first meets Shinobu, she dislikes him intensely, even though he manages to help her out of a series of embarrassing mishaps. She is therefore surprised when she finds out that she has been forced into an arranged marriage and that her husband-to-be is none other than Shinobu! The story then has many twists and turns, as Shinobu has to fight in the war, Benio has to wrangle with the idea of getting married, and getting along with her future in-laws and employer. Meanwhile, the great Kanto earthquake looms in the future...