亡国饗宴ナイトメア (Boukoku Kyouen Nightmare)

Background
"Boukoku Kyouen Naitomea" is an original song by Machina and Nazuka featuring Hatsune Miku, Megurine Luka, GUMI, Kagamine Rin, Kagamine Len, MEIKO, IA, Sachiko, KAITO and Camui Gackpo.