In the midst of a mysterious, endless night, an average student fixed his sights on a classmate who possessed flowing raven hair, the girl he had always longed for. His plan was simple: he orchestrated happenstance meetings by bumping into her daily, yet he failed to make any progress with their relationship, which languished in stasis. On the other hand, the black-haired girl believed in the interconnectedness of fate, and sought to experience life to the fullest, leaving the future to unfold on its own. While exploring Kyoto's vibrant streets, she stumbled upon a book from her childhood, and this serendipitous moment spurred her onto a fateful journey. By chance, the same book was being sold at a second-hand bookstore, which the college student saw as yet another opportunity to cross paths "accidentally". This time, he aimed to grab the book before her, hoping that the thread of destiny would eventually connect their hearts.