Aoi’s twin sister, Akane, and their next-door childhood friend, Mashiro, were the perfect couple. Although Aoi harbored a secret crush on Mashiro, she is now consumed by guilt after Akane’s untimely death. One night, Aoi discovers a massive collection of news clippings in Akane's room—all related to the accident that killed their parents... A suspenseful Girls' Love story revolving around a sister's lover and the mystery of her death.