Kimi to Boku no Saigo no Senjo, arui wa Sekai ga Hajimaru Seisen

Our Last Crusade or the Rise of a New World (Manga), The Last Battlefield Between You and I, or Perhaps the Beginning of the World's Holy War, The War Ends the World / Raises the World, 너와 나의 최후의 전장, 혹은 세계가 시작되는 성전, キミと僕の最後の戦場、あるいは世界が始まる聖戦, 你与我最后的战场，亦或是世界起始的圣战