Responses
I love Lala no kekkon! Have you read "Find Cinderella!"? It's about the mc disguising himself as his sister but there's actually NO SISTER since he doesn't want to reveal to ml that he's a man. But ml knew all along about the real him.
https://www.mangago.me/read-manga/find_cinderella/

This story is so good. Waiting for more, but for now I want to ask you guys. I know remember I've read stories with the same premise of being marrying ml in disguise such as "Lala no Kekkon"
I can't seem to remember the titles of other stories. So any recommendations similar to this?