
So jinwoo just witnessed the battle between the angels (i forgot their name lets just call them that) and the shadow army After the battle, it was shown that the shadow monarch was betrayed by the demon king baran and the king of the beast (the white wolf) but since shadow monarch is op, he was able to kill king baran.
Since jinwoo had similar powers as the shadow monarch, it appeared that he became the shadow monarch himself, thus the creation of another heart, the black heart beside his human heart. And after that the head angels came down signifying that the memories of the past has been recalled.

I had to read it again to get it. So i believe that Yuuri and Viktor are fated but yuuri thinks that he isn't fated with Viktor because he used a condom thinking that made yuuri think hewas using a safety precaution to prevent unwanted children, to still be able to severe their relationship once viktor finds his fated pair. And yuuri, vows to do anything to make viktor stay despite being the bad guy if ever the fated pair appears.
Viktor on the other hand knows they are fated pair since yuuri doesn't seem to know the pull between fated pairs. Yuuri is an alpha but he is responsive to viktor despite not being in a rut. Same goes to viktor who just finished his heat. That's why he said "because its... Me." He then says that Yuuri thinking about blaming himself and being the bad guy is pipe dream because it will never happen because they are already fated.
Its this or i might have misunderstood it
I just want the part where they finally become mates ಥ╭╮ಥ
It's in the next chapters, there's 2 more, look around the comments section you'll find the Spanish link (I couldnt find it in english)
Oooh! Thank you so much!