Omega-sama wa Ai wo Shiranai

Isetani, an alpha who is an elite employee at a major corporation, meets Sei, an omega who works at an SM club who was brought in by Isetani's client. He initially declines his services, but feels strangely uplifted at the sight of Sei, and spends the night with him. Isetani wants to make the elusive Sei his own, and asks him to become his fated pair, but Sei has a certain secret?!

(Source: Media Soft, translated)

Included one-shot: Kougaku Baito ni Tsurareta Kuro Gal♂ wo Oil de Noukou Massage