High School Debut follows Haruna Nagashima, a former softball player who focused on sports in middle school and enters high school determined to get a boyfriend. Clueless about fashion and romance, she asks the cool and popular Yoh Komiyama to teach her how to be attractive and catch a guy. He agrees to coach her on the condition she follows his rules, which leads to a humorous and clumsy journey of self-improvement. Readers enjoy the story for its sweet, slow-burn romance, the comedic mishaps of Haruna's makeover attempts, and the heartwarming relationship that develops between the earnest heroine and her strict, secretly caring mentor.