Responses
Maybe “Secretary gwanggong’s survival diary” ???
That happens in the novel of this one, but the manhwa is only a promo.
https://www.mangago.zone/read-manga/living_as_a_extra_in_a_bl_omegaverse_novel/
I remember reading a omegaverse about this guy that reincarnated in a story in the ml Alfa secretary and it’s “obsessed” with the ml omega of the story and he help the ML Alfa to get more closer to the omega but it result that the our protagonist is an omega too and then he suddenly has his rut and his boss the ml alfa help him it happens in a hotel if I remember I really want to finish the story