Asahina Mafuyu is a third-year student at Miyamasuzaka Girls Academy. She excels in academics and sports and is admired for her smarts, athleticism, and humble sincerity. She is heavily burdened and pressured by the expectations placed on her by her peers and her parents. Mafuyu is known for her polite and warm demeanor, but she struggles with expressing true emotions and identifying her own aspirations due to parental pressure. She is also the lyricist of the underground music circle 25-ji.