i thought of something similar, where i think luft is the seme from "close your eyes". but leo isn't the uke from "close you eyes", since luft said that the "original" dragons have human partners, and since leo is not human, he can't be the uke from "close your eyes"? plus, luft said he mistook leo for his partner, and leo even admitted that luft wasn't his partner (i think).
But he really is the character from close ur eyes
maybe his human partner died and reincarnate in leo
for a moment, i think leo and the uke from close your eyes is the same person.. and the Mr.guess in this story looks younger than in the "close your eyes". so, maybe "close your eyes" is the future one?