Also known as: 千年の誓いの果てに
English: At the End of a Millennium Vow
A song by mothy featuring Hatsune Miku released as part of the Evillious Nendaiki Miku Symphony album release. It's sung from the perspective of Michaela (Evillious Nendaiki), and serves as a spiritual successor to Sennen No Wiegenlied (Vocaloid).