Kota Takeuchi is a first-year student at Hoshimi High School and a supporting character who shares a class with the protagonist, Okuto Nakamura. His defining social identity is that of a close friend to the love interest, Aiki Hirose. Takeuchi has a playful and mischievous personality, and he often fools around, which consistently results in him being scolded by Hirose and the rest of their friend group. His primary motivation is the pursuit of lighthearted fun and energetic socializing. In the story, he functions as a comedic element who reinforces the vibrant, somewhat chaotic atmosphere of the classroom, providing a contrast to Hirose's more grounded and patient demeanor. His key relationships are with Hirose, whose authority he frequently tests, and with his other classmates, including Nakamura and the wider school circle. While he does not drive the central romantic plot or undergo a personal arc, his consistent presence and troublemaking antics define his role as a static fixture of the high school backdrop. His notable trait is his knack for stirring up minor trouble, which serves as a source of humor and emphasizes the camaraderie and social dynamics of his peer group.