Responses
We can see that the teacher took medicine ( http://www.mangago.zone/read-manga/tsuki_no_ura_wo_koete_omegaverse/nbt/7852a60fbb35b7aa/Vol1_Ch1/20/)
And it's the alpha who is attracted by the omega smell, so the teacher is omega and the student alpha (probably)
I don't really like the art. The student looks cute but the teacher doesn't look sexy (≧∀≦) nor handsome at all. Moreover, I'm confused by who is the omega one between them.