(This is a soulmates AU One-shot
Marinette has been dying to have her mark ever since she knew about soulmates. She's wanted to live her life with the person she's meant to be with, like everyone else.
That changes though, when she becomes Ladybug at 15 a few months before earning her mark. She meets her flirty feline partner, Chat Noir, and also her model classmate, Adrien Agreste. She fell for one, and rejects the other, not knowing they are the same.
Then she earns her mark. But it's not just one mark, it's two. Two marks, and she has no clue what to do.