First one is this, I think https://www.mangago.zone/read-manga/true_end_of_those_days/
Second one imma keep my eye out because it sounds interesting, does the uke have short hair or long hair?
Short hair!
And I think the seme has long hair
Thank you for the first one!
Hello! I now remember the title; it's "Iras."
1: this is a manga. an ordinary man (seme) gets transported to a different world where he has to defeat the demon king (uke) but instead of killing demon king he wanted to marry him and then they go back to the human world and basically demon king becomes a house wife. Demon king can turn into a woman too.
2: I think this was a manhwa? I can’t really member much of it but I know there were like 2-3 chapters. The uke had red hair? And then he was like some sort of prince and stuff but then his father sold him or soemthing to another prince (seme) or what so (I think seme was his enemy and dark coloured skin)