Link: http://archiveofourown.org/works/8238214/chapters/18879793

mermaid Marinette gets caught by a pirate called Adrien......rest are to be seen in this romance

The devious pirate captain Chat Noir and his crew The Miraculous' has once again taken something very valuable. But this time it's a mermaid named Marinnette of as she's known to his crew, Ladybug. Will she ever be able to escape or will she stay as his prisoner forever or will she fall in love with him? Find out here!