Rui Nagai
the Big O — Opening Theme 03:07
Nagai Rui — BIG O! Show Must Go On (Anisong Collection Vol 1. Ver.) 03:52
[Vandred] Rui Nagai — Kanojowa Dandies Mover Net 03:54
Nagai Rui [The Big O OST] — BIG-O! 03:12
Nagai Rui — Big-O! Show Must Go On 01:15
Rui Nagai — Big - O 03:13
[Vandred] Rui Nagai — Good Day Friends (Diita) 05:31
[Vandred] Rui Nagai — Slow Down (Jura) 04:39
Nagai Rui — BIG-O! 03:11
Rui Nagai — Big O! 03:10
Rui Nagai — Raison d'Etre (original karaoke) 04:06
[Vandred] Rui Nagai — Kokoni iru Kokoni Ite Ezra 04:25
Nagai Rui [The Big O OST] — BIG-O! (SHOWTIME VER.) 01:15
Nagai Rui — Big-O! Show Must Go On (Extended) 05:55
Nagai Rui — BIG-O! (KARAOKE VER.) 03:11
[Vandred] Rui Nagai — Atta Totanni Hitomebore Highway 04:24
[Vandred] Rui Nagai — Well Come Home (Parufe) 04:09
Nagai Rui [The Big O OST] — BIG-O! (KARAOKE VER.) 03:12