During a mandatory 'Couple Practical' at school, Jirou Yakuin, a third-year student, anticipates teaming up with classmate Shiori Sakurazaka. However, fate pairs him with the vibrant gyaru Akari Watanabe instead, who had her sights set on someone else. As they discover their desired partners are now paired up, Jirou and Akari begrudgingly join forces to achieve a top-ranking position. Their goal: to earn the chance to swap partners. In a surprising twist, Jirou unintentionally steals Akari's first kiss, setting off a chain of unexpected events.