Chapters 3-12 of the light novel detail the developing relationship between high school students Yamashita Yuuto and Watanabe Asahi, who are childhood friends. Yuuto is portrayed as somewhat reserved and prone to self-deprecation, while Asahi is energetic, cheerful, and openly affectionate towards Yuuto, though she struggles to express her romantic feelings directly. Their close bond is evident to their classmates, who often mistake them for a couple, much to Yuuto's mild annoyance and Asahi's quiet delight.
The narrative begins with a typical school day, highlighting their casual interactions and the teasing from their friend Morikawa Hiroki. Asahi's visit to Yuuto's house on a Saturday marks a turning point. They spend the day together, watching anime and enjoying Asahi's homemade lunch. During this time, Asahi initiates a "lover's practice" game, attempting to simulate romantic scenarios like feeding each other and sharing an ice cream. Yuuto, though flustered and hesitant due to their platonic status and his own inexperience, eventually succumbs to Asahi's persistent charm and their shared history. Their practice is interrupted by Yuuto's mother just as they are about to share their first kiss, leading to a comedic misunderstanding and a family dinner.
The following day, Asahi meets with her close friend Fujimiya Suzuka, a beautiful and mature girl whom Asahi admires. Asahi confides in Suzuka about her desire to be in a relationship with Yuuto and her frustration with his apparent reluctance to confess, despite their mutual feelings and a past promise related to Yuuto's rejection of Asahi's earlier confession. Suzuka, aware of their history and Asahi's feelings, agrees to help Asahi devise a plan to encourage Yuuto to confess during the upcoming Golden Week holiday.
The chapters then shift to the beginning of Golden Week. Asahi surprises Yuuto by bringing him a homemade bento for school, explaining her enjoyment of cooking for him as a motivator. She expresses her desire to continue making him bentos, which Yuuto readily accepts. Asahi then proposes they go to school together, and they engage in a playful race. Upon arriving at school, Asahi informs Yuuto and Hiroki that she and Suzuka have planned an outing for the four of them during Golden Week, which is met with general agreement. The group discusses their Golden Week plans, agreeing to finish homework together at Yuuto's house for the first two days, followed by two days of leisure and a final day for relaxation.
Later, as Yuuto and Asahi walk home, Asahi expresses her insecurity about Yuuto's reserved demeanor when interacting with Suzuka, contrasting it with his ease around her. Yuuto explains his nervousness around Suzuka due to her beauty and maturity, assuring Asahi that her own approachability is a positive trait. He also buys Asahi her favorite ice cream to cheer her up, a gesture that subtly reinforces their close bond.
The narrative culminates with Asahi waking Yuuto up early for school, bringing him another bento. Their parents, who are very fond of Asahi, encourage Yuuto to pursue a relationship with her. Asahi reiterates her enjoyment of cooking for him and her desire to continue making bentos, solidifying their routine. The chapters end with Yuuto and Asahi heading to school together, their relationship continuing to evolve through shared experiences and unspoken affections.
