The story follows Kazuya, a high school freshman living alone, who navigates his daily life and a developing relationship. His routine is disrupted by the unexpected presence of Arisa Shinomiya, the school's beautiful and seemingly perfect student council president, who is also his childhood friend and secret girlfriend.
The chapters detail Kazuya's interactions with his best friend, Mikihisa Ito, a popular and outgoing classmate. Kazuya finds himself increasingly drawn into Arisa's chaotic private life, which starkly contrasts with her dignified public persona. Arisa, despite her "high-soaring flower" image at school, is portrayed as somewhat of a "good-for-nothing" at home, prone to impulsive behavior and relying heavily on Kazuya. Their relationship is kept secret from the school, adding a layer of complexity to their interactions.
Key events include Arisa frequently visiting Kazuya's apartment, often unannounced, to eat his cooking, play games, or simply spend time with him. Kazuya, though sometimes exasperated by her antics, clearly cares for her and indulges her requests, such as teaching her for exams or making her favorite curry. Their dynamic is characterized by Kazuya's patient handling of Arisa's more childish and demanding moments, and Arisa's unwavering affection and reliance on him.
World-building elements are minimal, focusing on the school environment and the social hierarchy, where Arisa is an admired figure. The narrative highlights the contrast between Arisa's public image as the "strongest student council president" and her private, "clumsy" self around Kazuya. This duality is a recurring theme, with Kazuya often having to cover for her or navigate situations where her two personas clash.
A significant turning point occurs when Kazuya's friend Mikihisa expresses interest in the student council president, unaware of her true relationship with Kazuya. This introduces a potential conflict and highlights Kazuya's protective feelings towards Arisa. Later, Mikihisa visits Kazuya's apartment, leading to Arisa's secret cohabitation being revealed to him, creating an awkward situation. The chapters also touch upon Arisa's occasional interactions with other student council members, like the secretary Miyashita, where Kazuya sometimes has to intervene to maintain their secret. The narrative arc shows Kazuya becoming more accustomed to Arisa's dual nature and their relationship deepening, despite the challenges of keeping their romance hidden and managing Arisa's eccentricities.
