Backstabbed in a Backwater Dungeon: My Party Tried to Kill Me, But Thanks to an Infinite Gacha I Got LVL 9999 Friends and Am Out For Revenge

Light, a child, is the sole human in the expeditionary group, Legion of Races, who are noticeably inferior to other races in the world. Left behind in the dungeon's depths by his teammates, Light saves himself by invoking the Infinite Gacha's power to enlist a level 9999 harem of allies. With the aid of his stunning and formidable companions, will Light break free from the labyrinthine prison and avenge himself against the entire world, including the Legion of Races?