
i’m soooo confused could someone explain to me please????

Well, from my perspective and some from the comments, it seems that our Seme in this story is a supposed Enigma, which is quite rare to be one considering they are an urban legend. We, as readers, aren't entriely sure if he is one considering this isn't common in the omegaverse tag to have another gender outside of the 3 common genders, but if you take a look in chapter 5, page 29 and page 30, the author pretty much confirms that the Seme is an Engima due to the changes to his eyes and that he is considered N/A in the chart. Of course, we can question why wasn't he assigned as a Beta or what if he was just a late bloomer, but since the author put in such key detail to his eyes during his break down, it's safe to say we can confirm (for now) that Seme is an Emigma.
Now, as for our Uke, it seems that he was indeed an Alpha at the first chapter of the story. I wouldn't know for sure if he was just considered a late bloomer in this universe, but as far as we know, we know he was medically assigned as an Alpha until he met the Seme who ultimately changed his gender as an act of revenge for forgetting about him and their promise. Why the Uke forgot about him and or the promise is quetionable since we still don't what happened to him after he was adopted by the Kuga family, but what we do know now is that:
1. Uke has two older brothers and a mother who pretty much despise him, probably due to the fact that their father has favored and or shown special treatment towards the Uke compared to anyone else in the family.
2. The Eldest(?) is obviously upset and has held back his resentment towards both the Uke and the father for a long time until now where we can pretty much confirm that he's going to kill his own father for the ownership of the company, money, or power. In addition to that, is probably planning to use the Uke in some type of way after his plan is complete.
3. (This isn't my idea, but what I learned from a comment) The Uke probably went through an actident or was forced to forget his past as his adoptive father wanted to connect with him on a common level between a father and son relationship which may explain why he had forgotten the Seme after a couple of years of being seprated.
Any questions left to ask?
I MEED MOREEE