Drugless Sex
Not omegaverse... there's the pheromone syndrome and several short stories about it... even researchers looking for the suppressor. The pheromones affects those attracted to the people having the syndrome.
Kawaisa Amatte Nanika ga Hyakubai
3 stories... a punk florist and a salary man who likes older men... then 2 students... and then a guy with a transvesty, they work at a tranny pub and the guy's dad is also a tranny.
Mesuochi Bl
Random stories and seems like different authors too...
If You Hate Me So
Fun read. 3 stories total, very well structured and everything. The last couple are Dojin and the uke from Love is an illusion, different world of course.
Konoyo Ibun