The Uke (Ashtar guy) I assume is someone immortal for sure, considering his physical features like the red eyes and pale form— I'd like to say a vampire?
And I assume the dreams W Ashtar that the Seme have been having with is for sure a memory at least from a very very far past, and I'd like to think that it's a Mortal x Immortal dynamic, and that the man shouting "Mr. Ashtar" in his dreams is actually him in a previous life but now he has reincarnated where the same Mr. Ashtar is still alive since he's immortal
Which explains why despite meeting him for the first time he already feels a burning desire, and hence the line he said "Why do I love you?" EUGHH