This is part of the story I was thinking about even though most of my books is in fact  ...mainly about Marichat, so I'll tell you the dynamic of their relationship:

There's no miraculous, no actual Ladybug but Cat Noir is a vigilante criminal who steals from banks, murder certain people, etc. He falls in love with Marinette when he walked inside of her parent's bakery.

Marinette feels annoyed with the fact a criminal is in love with her but can't seem to get him away from her because he was possessive over her. (Like in the picture.)

Adrien, a model, but he has a little bit of Cat Noir's personality but is a deliqucent, jealous of Luka and Nathaniel, he starts making Marinette's life a living hell as Cat Noir.

Marinette, a normal girl but is an emo blogger known as the nickname "Ladybug" or "Princess/Bugaboo", she is a designer who just recently works for Gabriel Agreste. Alya is her assistant and BFF.

Also this is a yandere story. It includes violence, a little blood, sexual scenes, and a few dirty jokes/cuss words. Mostly mature.

WARNING: Those who are 17 or younger, people who don't like it mature... Do not read it till I make a innocent version of it.