This is weird, weird story and art. No good weird. Awkward.
I have several thoughts on this, Kloff is very homophobic, in that world of alphas, betas, omegas, etc the alpha-alpha relationship is seen as m-m in Victorian times. Kloff is so terrified of him liking another alpha that he simply lies to himself. In the first line of life, a lot could have been avoided if Kloff had been honest with himself.
on another topic, I wonder how Aerock's upbringing was in this timeline, i.e. in the first timeline his dad mistreated him and demanded a lot from him because he was an alpha and shouldn't cry and all that stuff.
But how was it with this Aerock omega? his father was demanding because he was a noble or he was more tender because Aerock was an omega and more delicate and the only child he had with his beloved wife?
Remember how Dojin has changed since the first chapters? Before he was a slim dominant alpha, the body of a boy, when he was cynical in love, he didn't want to associate with omegas at all and wanted to live a free life...then he finds Hyesung and after having Byul he becomes everything big? All muscular?
And he flourished and his body developed even more.