Kamishiro -the white haired guy-actually an Alpha, after he was seeing Sena -the black haired guy-have sex with their Teacher, for some reason he vomited and then "BEAM!" his gender change to an Omega. And as far as the chapter goes, they became pair.
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.
Koi Suru Mae ni, Amai Hatsujou. - Shachou to Unmei no Omega