LoganW21406-1
Oscar was a member of the famous Hero Party in his Empire, the Concord of Races. However, he wasn't treated right or even humanely by both the party & the Empire he lived in: the Empire of Opratus.
All because he's a human, a species all of the other races despises because they all view humans as weak and worthless, deserving to be tortured, enslave & killed in the most sadistic ways.
Eventually, the races decided to implement Order Purity, meaning it was time to exterminate any and all humans in their kingdom. Most humans were wiped out, leaving Oscar to be the sole human survivor, albeit terribly injured.
Barely escaping death, Oscar managed to flee the country on a boat he stole. For days on end, he tried to find a new home. And, eventually, he found it: the Kingdom of Avraca.