β no Yuutsu

In an industry where it's common practice for alpha hosts to only accept alpha clients, there is Hisui, a charismatic alpha who acts as the face of a progressive host club that accepts clients of all genders. Then we have Keishi, a beta, who works behind the scenes of the club, secretly adoring Hisui. One night, Hisui was attending to a regular omega client when the client suddenly went into heat. Hisui, affected by the omega's pheromones, also went into heat and tried to lock himself in the club's office. Keishi then went after him, because he knows a way to help with an alpha's heat that only betas can do.

(Source: Kadokawa, translated)

Note: Includes two extra chapters.