So that man was from another dimension in which mc was the one who actually died
Oo this sounds interesting I wanna know too
oh! i read this. lemme go look for it, commenting so i circle back!
hmm might be this one?
https://www.mangago.me/read-manga/like_a_violet/
YESSSS OMGG THANKYOUUU SO MUCH!!
It was a full color yaoi manhwa i think with only a few chaps cuz it was still new when i read it a couple of months ago. It also had an amazing artsyle
It was set in an apocaliptic future of sorts in which mc (black haired) is a scientist absolutely in love with one of the " astronauts" of the station. In the 1st chap we see that mc has been overworking cuz he is waiting for his man, and when he returns they have amazing sex. But right after that ml is called again on a mission but this time he never returned cuz he died outside trying to help a teammate. I think they also had a golden retriever together
After the tragedy, mc cannit move on and drowns himself in work. One day while trying to get his dog out of the laboratory, it leads him to one of his latest works which is a sort of multidimension portal. Out of nowhere it' s switch on and out of the portal comes out an astronaut with the same face as his dead lover.