During middle school, Haruna Nagashima devoted herself to playing softball while secretly hoping to find romance, though she had no luck. High school has just begun for her, and she now has the ideal opportunity to fall in love with a potential boyfriend. However, there is one issue—she has no clue where to start! On her first day of school, she accidentally bumps into You Komiyama, the most popular boy in the grade. Given his striking looks, Haruna is convinced he can help. The handsome boy reluctantly agrees to coach her on love under one condition: she must not fall in love with him. Under You's guidance, will Haruna be able to launch her high school debut and find herself a boyfriend?