The bond between high school friends is unique. The trio of high school girls includes Haruka Arai, a naive yet sensitive genius; Yuki Katase, the rational member who needs to keep everything organized; and Misaki Fujikura, the sociable type who gets along with almost everyone. As the three girls navigate their daily lives as students, they experience the various joys that arise from their shared time both inside and outside the classroom. The carefree nature of high school life, accompanied by syrupy-sweet moments of leisure in between, is not to be forgotten—no matter how much time passes.