[DeepL Translation - needs review] Volume 1 Introduction: Tsubasa Uehara and Arisa Sonoda are twin sisters. After being separated by their parents' divorce, they are reunited for the first time in three years. It was supposed to be a very happy reunion, but... But then tragedy struck their twin sister, Arisa. Tsubasa, the twin sister, pursues the "secret" behind the tragedy. Unpredictable school suspense, volume 1!
(Translator: DeepL)
