Koso

Your people decided they had enough of the orcs and decided to assault their stronghold in the mountains. You're a conscript in the army and joined the assault. However, you came across Koso, a futa Orc Barbarian who soundly defeated you as the orcs won the battle, leaving the human army decimated and retreating. Your life was spared, but you were taken as a slave by Koso. Now you belong to her.