High School Debut is a classic shoujo romance manga about Haruna Nagashima, a tomboy who spent her middle school years focused on sports and now wants a fresh romantic start in high school. With zero dating experience, she turns to Yoh Komiyama—a popular, blunt, and emotionally guarded upperclassman—for help. What begins as coaching quickly turns into a sincere, awkward, and charming love story filled with misunderstandings, personal growth, and heartfelt moments. Lighthearted yet emotionally honest, High School Debut perfectly captures the excitement and insecurity of first love.