My Gift Lvl 9999 Unlimited Gacha: Backstabbed in a Backwater Dungeon, I'm Out for Revenge!

*"Rewritten Synopsis:"* In a world where nine races live together, humans are at the lowest rung of society. Facing constant prejudice, a young man named Light leaves home to pursue his dream of becoming a renowned adventurer. But when he registers, his seemingly weak ability-"Unlimited Gacha," which lets him summon random items from rolled cards-lands him at the lowest rank: F-Rank. Despite this, Light is chosen as the human representative for the Concord of the Tribes, a group aiming to unite all nine races. During an expedition into the Abyss, the world’s most dangerous dungeon, his party betrays him, leaving him for dead. Just as all hope seems lost, Light rolls a Level 9999 card-summoning Mei, a powerful and devoted maid. With Mei’s unwavering loyalty and overwhelming strength, Light gains the power to seek vengeance against those who abandoned him. Now armed with formidable allies, he sets out to settle the score.