The narrative begins with Amane Himesaki, a popular and beautiful classmate, approaching the protagonist, Futsuu Katabe, and boldly asking him to be her boyfriend. Her stated reason is that Futsuu has the "face of a light novel protagonist," and by dating him, she can position herself as the "heroine." Futsuu, though taken aback, agrees, marking the start of their unusual relationship.
Their interactions quickly become a regular part of Futsuu's school life. Amane frequently clings to him, playfully teasing him about his reactions and asserting her "heroine" status. She often brings up light novel tropes, such as the concept of "status screens," which don't manifest in their world, much to her amusement and Futsuu's bemusement. Amane's desires often drive their activities; she expresses a craving for crepes, leading Futsuu to suggest they go to a crepe shop after school, even though her packed lunch contains similar ingredients. Later, she impulsively wants to go to the beach, having found a "very sexy" swimsuit, but Futsuu points out the impracticality given the autumn season.
Their differing tastes in literature are highlighted when Amane finds a particular light novel too complex and lengthy, while Futsuu appreciates its intricate world-building. This leads to a brief exchange where Futsuu compliments her ability to bring happiness to the world, while she acknowledges his intelligence.
A turning point occurs when they visit a bowling alley during a school closure due to a virus. Amane proposes a bet: the loser of their bowling match will kiss the winner. Futsuu, admitting he's new to bowling, is outmatched by Amane's skill.
Amane then expresses a desire to be called by her given name, Yurika, rather than "Himesaki-san." Futsuu acknowledges her name but finds "Himesaki-san" fitting. To emphasize her point, Amane begins calling Futsuu by his surname, "Katabe," issuing him commands like fetching juice or turning on the TV, which he obliges. This playful dynamic eventually leads Amane to admit she truly wants to call him by his first name, Futsuu, a sentiment Futsuu finds endearing.
The narrative further explores Amane's large family, as she reveals that all her numerous siblings share the surname "Himesaki," emphasizing the unusual nature of her family structure. Finally, Amane shares a picture of her seven pet flying squirrels, revealing their hilariously eclectic names, including "Geriosuterius" and "Yurika-chan Dash," which leaves Futsuu impressed.