why do you sound so specific lol XD....the only one close to what you're talking about that I read is "A Stepmother's Marchen"
oh wait now that I think about it, there was one... "The Viridiscent Crown"...I think it's similar since they are not related by blood but still legally siblings....I never finished reading them. I don't know if they marry or not. I got bored lol.
I know damn well if you search enough, you will find ACTUAL incest cause Authors nowadays are WILD AF!
when does this happen in Stepmother's Marchen? I'm not done reading it but pre sure Nora is the ML. Also adopted sibling being the ML is pretty common, especially in Japanese manga. I know bc I drop them everytime it happens. Off the top of my head, "Beware of the Brothers" lol
A lot of stories that have “brother” in the title… yeah usually it’s the keep it in the family ending. You know you gotta start worrying when they reveal “oh! We’re not technically blood related!” There’s surprisingly a lot.
This is what sibling should look like not marrying each other after grew up together （￣へ￣）