I'm an Omega, but I became the Villainous Guide in a Beta world (Associated Names)

He was an Omega who got transmigrated into a novel as Lee Taerim, the villainous guide in ‘The Good-Hearted Guide’. The novel is set in a world without secondary genders. Despite all the prejudice from others and his busy work schedule, Taerim quietly carries out his duties without complaints. One day, he saves the life…