Quick answer — Back-On performed 2 anime themes, including "Cerulean" from Gundam Build Fighters Try, "Nibun no Ichi" from Gundam Build Fighters.
Back-On performed the anime theme songs "Cerulean" (Gundam Build Fighters Try), "Nibun no Ichi" (Gundam Build Fighters).
Back-On's first listed anime theme is "Cerulean", the opening of Gundam Build Fighters Try.
