it's not omegaverse or impreg, but it is about scent and a pheromone kind of thing, and it's a little like alphas and omegas. It's explicitly sexual, but without showing genitals.
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Alpha ga Alpha wo Daku Houhou