Private Yūgaoka Girls' High School, Born at the intersection of three towns—Omotesandō, Harajuku, and Aoyama— The third year of the school idol group Liella! begins. For first-generation members like Shibuya Kanon, this is the final year of high school. Before the school rooftop where they poured their hearts into singing, and the tree-lined paths they raced through with all their might, all turn into memories— "Let's make a promise—." A story realized together (School Idol Project), begun by five, dreams fulfilled by nine, and bonds tied by eleven. Take flight! Our Love Live!