Omegaverse yaoi

Been searching for this one cause I’ve read this a long time ago. All I can remember is there’s a “fated pair” trope. it’s kind of a sad story and I remember it being a japanese manga??? (again I don’t know if this is correct) an omega and an alpha who met by chance but isn’t a fated pair. The alpha is a pharmacists, then on the middle of their story he met his fated pair in his work place and tried his best to not be affected of it. But his fated pair kept clinging into him (since there’s this kind of scent that attract each other)