Step through the tunnel—and discover the fragile beauty of goodbye. After a tragic accident, Hiro and his friend Natsuki are pulled into a mysterious tunnel where time doesn’t flow the way it should. As they navigate this strange, otherworldly place, the two uncover secrets about themselves, face their fears, and discover the fragile beauty of life and love. This emotional, thought-provoking story blends sci-fi mystery with poignant coming-of-age themes, delivering a journey that lingers long after the last page.