Didn't care that much for the first couple but the second is beautiful. The alpha is incredibly respectful and caring. Blushes a lot which is really cute. The beta is self-sacrificing and strong. Beautiful pair!
(Spoiler)
They also both have sexual trauma and help each other overcome it . The beta was forced to sell his body and the alpha was raped. Don't think I've ever seen an alpha rape victim before. While the act is still horrible of course I respect stories that dares to be a bit different.
Kashikomarimashita, Destiny