The Great War devours millions of lives. The children lost their parents, orphan are everywhere. Salvage is an institution funded by the government especially for the orphans to become their country heroes in the future. Akira Koshino is 14 years old boy orphan desiring revenge for the death of his parents aiming to accomplish his goal. During his journey, he encounters and makes friends, foes, and fantasy creatures. What kind of challenge awaits them? Let's join out in the journey of Akira Koshino to explore the 9 realms!