
Yes, he was bitten by (and paired with) an alpha (who is NOT the one he ends up with). Later, the alpha leaves him alone during his heat and when the beta shows up, they have sex--but he is sick the whole way through it. Still, the omega and beta keep it up until the omega gets pregnant (by the beta). Later on after the baby is born, the beta and omega have sex again--outside the omega's heat--and they have sex just fine (in fact, I think the line is something like "Your dick feels so good" or somesuch).

I think that's the hard thing about the omegaverse is that it can changes SO MUCH from one mangaka to the next (and even from one story to the next by the same mangaka). I am part of the Omegaverse Addicted Scanlation group and we have regular discussions in our chat about whether something can happen in one particular mangaka's universe or not (currently, that is happening a lot in discussion over Shounen no Kyoukai).
I think a lot of them, while they use the omegaverse, tend to take liberties to make their stories work.
(I certainly understand that. I'm an author, I do it myself. :)

Awww, thanks. It is both a blessing and a curse to be able to see them as they come out. I have a (general) policy that I don't read ongoing series (I got SO burned by Junjou, Finder, and Super Lovers, to name a few). Of course, working with the group, I not only see them before they series is done, I see them before they're translated. Since my Japanese is rudimentary at best, that makes things REALLY interesting until I get the final translations. LOL
Shounen is really dramatic. The first volume really gets you in the gut but it comes out happy and you can read to that point and feel okay. The second volume picks up MUCH later and is all new. It's good, though and I suspect since volume 1 ended happily, then volume 2 will, as well.

Well, if you don't mind spoilers, then... (leaving it farther down for those who don't want to know).
...
...
...
...
...
So, Taiga TRIES to rape Yuka but doesn't succeed. Karou gets there in time and, uh, does it instead. >.> So, they're paired as of the end of the first volume (chapter 6).
Chapter 7 opens with Taiga grown and a salaryman. He has a live-in partner named Rin who is an omega but NOT paired with him (and not his fated pair). You find out, however, that, of all people, *Yuka* is Taiga's fated pair. The next chapter gets even better.
Rin, the guy Taiga is living with... is Karou's fated omega.
I'm dying to see what happens with those guys. SO MANY ways things could go, but there's canon yet in that mangaka's version of the 'verse we don't know about (can a bite be overwritten?). In that chapter, Yuka isn't in heat, so we don't know if Taiga, his fated pair, would still react to him or not. Karou about lost his shit when Rin showed up (likely because Rin isn't paired).
Fine mess they've got going there...

Yeah, Taiga has some growing to do. I liked that he at least helps Yuka and Karou by carrying Rin back to the bar and out of the range of Karou.
I *do* hope Rin and Taiga end up together. My theory is that this whole volume is an attempt to make a point that the fated pairs *can* be ignored when there's love between two other people. At least, that's my hope anyway. :)
I still don't think Seiji loves Aiji romantically (he's just guilty), and that's why I pity Aiji so much, to be stuck with someone who doesn't love you. And I find Seiji selfish too (I'm not talking about when he's a kid only). Asking Towa to let Aiji go and live with him when he knows that Aiji's life has been screwed by him and he can't be embraced by anyone else even when he's in heat???
And wait, why does Seiji suggest Towa tops Aiji? Doesn't the fact that Aiji's mated mean that his body will reject other semes and give him pain??? What idea of omegaverse does the author have in mind?
(When I read the raw and saw the cycle between the 3 of them, I thought it's about who tops who...)
All in all, I love Towa and Aiji ヾ(❀╹◡╹)ノ~