@OmNom: Well, the glass slipper is the symbol of Cinderella. The main character resembles a Cinderella as he was waiting/searching for an alpha prince charming to save him.
I think the manga is really good. The drawing is just slightly above average for my taste, but the story is surprisingly delicate and well written. SPOILER ALERT for the next paragraph... (sorry, I don't know how to use the spoiler masker 🙁 )
The pace of the story is good, not too long to be dragging but not to rush to make you numb. Thus, the message is conveyed sufficiently. It has potential to be a more complex or tragic story, but the mangaka stopped at a decent point. For this I eternally grateful, because I don't have the heart if the uke should face more hardships than he'd already had ^_^
I love the how the mangaka uses the flashback plot to explain the background story, and to disclose an inferiority complex and the love for the seme beneath the uke's shallow, selfish, and proud facade. Also love that the inner thought of the seme was not shown until the very end, although it's easy to guess. The antagonist is also quite well written: a jerk who does not realize that he is being a jerk, but not 100% bad either. More like a spoiled, childish, and annoying character, rather than evil. Even the rape scene could be considered as an accident (under the influence of pheromones).
One of the high point of this story is that the hardship faced by omegas in the society is very well described. Being an omega is like being a handicapped person in our society: not able to do the job well due to physical constraint, subject to ridicule and abuse, marginalized by society, and being in constant danger of attack at his weakened state.
Finally, to anyone who don't like omegaverse: I used to be like that, but then I I gave it another chance, and surprisingly found several good stories. The omegaverse is like a dystopian society..... driven by lust. In a well written story, it could convey really important social messages, but in a poor written one, it's just a justification to write overly perverted and meaningless sex scenes.