Shieldfreedens' Hero

Royalties have agreed to summon one of the legendary heroes in each nation and to help them grow stronger to fight of the waves. However, situation gets worse after queen from Shieldfreeden discovers that other nations are keeping demi-humans as slaves. Other royalties do their best to free demi-humans from slavery but it isn't enough. So Shieldfreedens hero goes on a quest to save them himself. What happens? Who does he meet on his way? Figure that out in the story about Shieldfreedens' Hero