Takamine Ruka (also known as Takaruka) and Seto Ruka (referred to as Setoruka) are typical high school students enrolled at Nozomigaoka High School. Having been childhood friends for years, they are affectionately called "Rukaruka" by their peers. During their third year, Takaruka found herself pondering the words of a friend who remarked, "It’s the same whether you come to school and head home every day." That moment led her to discover a classroom adorned with sweets at the back of the school. Upon entering, she realized it was the plastic model club, which was on the brink of being disbanded. Encouraged by their advisor, Mr. Yomota—fondly nicknamed "Yomo-san"—the two girls decided to begin crafting plastic models. They soon became captivated by the enchanting allure of the models, which gradually sparked interest among other students and the wider school community...