I really love this opening =v=
I don't own anything.
Lyrics for the very first part:

Romaji:
Consentēs, Diī, Iūnō, Iuppiter,
Minerva, Apollo, Mars, Ceres,
Mercurius, Diāna, Bacchus,
Volcānus, Plūtō, Vesta, Venus.

English:
Roman Gods: Juno, Jupiter,
Minerva, Apollo, Mars, Ceres,
Mercury, Diana, Bacchus,
Vulcan, Pluto, Vesta, Venus.