This time, following the story that concluded in Volume 9, comes the release of a wondrous "side story"! Responding to the many sorrowed voices, author Asano Atsuko declared, "Then I'll write a supplementary story!" Recalling her affection for the characters, the author herself is burning with ambition at the chance to breathe further life into Shion and Nezumi, who possess such complexity and unfathomable fascination. By selecting moments from Nezumi and Shion's lives that she had not previously addressed, she begins to unravel their secrets...