Reversal
Ha-Jin Lee, living as a "Beta," hides his real name, "Yoo-Han," and his past as a "zealous omega." Burdened with debt and family, Ha-Jin's daily routine has become a quest to please Jin-Seung, the son of the CEO of J Tech. One day, at a business meeting, Ha-Jin reunites with his high school first love, "Seong-Hyeop." Seong-Hyeop, the son of the chauffeur who once lived with Ha-Jin, has now become the CEO of a major corporation. Ten years later, their pheromones remain etched into each other's consciousness. Amidst the reversal of their relationship, Seong-Hyeop proposes a sex partner to Ha-Jin, who had left him, to monopolize his attention...
(Source: Lezhin, translated)
Note: Chapter count includes eight side story chapters.