Yesterday Wo Utatte Ex – Genten Wo Tazurete Toume Kei Shoki Tanpenshuu summary:
A special volume containing background/design information on the main series, some extra side stories, as well as some early works by Kei Toume.The Sea Where the Siren Lives:"In the city by the sea, we understood that we could never understand each other."Related:Yesterday wo Utatte:http://mangapark.com/search?q=yesterday-wo-utatte