Jirou Yakuin had his sights set on being paired with Shiori Sakurazaka for the mandatory "Couple Practical" class. As a senior in high school, Jirou needed to prove his ability to coexist with the opposite sex while maintaining harmony, all under the watchful eye of video surveillance. Despite his hopes, fate intervened and Jirou found himself paired with the wildly opposite Akari Watanabe. Meanwhile, Akari had been hoping to be paired with her crush, Minami Tenjin. Their dreams are dashed when Jirou and Akari learn that Minami and Shiori are paired together. But instead of giving up, Jirou and Akari team up to make it into the top ten, where they can exchange partners with mutual consent. In the heat of the pursuit, Jirou impulsively kisses Akari goodbye, unaware of the potential fallout from his actions.