Anime Song Database
Source: MyAnimeListWorld War Blue
Theme song information
Opening Themes
retrospective world by Gear (CV. Nobuhiko Okamoto) & Tezhilov (CV. Hiro Shimono)
Ending Themes
0 to 1 no Hana by Neru (CV. Suzuko Mimori) & Opal (CV. Izumi Kitta)