Sword Art Online: Darkness

Ever since the beginning of Sword Art Online's beta, Yami wished that he could live there instead of the real world. When his wish is granted in the form of SAO becoming a death game, he knows he screwed up. Yami knows that it's his fault that Kayaba Akihiko made SAO that way, all because of something that he said to him once. "I wish this were the real world." (Nonexistent Kirito)