Divine Ability Ritual ~ My reincarnated older sister became my younger sister, and I ended up being used as my sister's strategic weapon to kill the Demon King ~

Another World――Ubiliar. A world where reincarnators are born possessing special powers called divine ritual magic, existing to stand against the mighty demon king's army. When the village where a young sister and her beloved elder sister live is destroyed by the demon king's army, the gears of fate begin to turn quietly.