With Chat Noir now working for Hawk Moth, Marinette must learn why and bring him back to her side...or defeat them both. To make matters worse, university will soon start and she's moving in with a roommate: A.A. Whoever that is. Crockpot burn. Touch of marichat; ultimately adrienette - COMPLETE

One month ago, Ladybug rejected Chat Noir, too in love with Adrien to accept. Now, on Halloween, the class heads to a haunted house, sans Adrien. But once they get there, things take a dark turn. Chat Noir has been akumatized, and seems intent on picking off his classmates one by one. Warning: Gruesome deaths inside. Also no he's not Chat Blanc #deal with it

Chat Noir has returned after vanishing mysteriously a few months ago, but he's come back as the evil Chat Blanc, and he's set on killing Ladybug. Marinette has only one chance to stop him - finding the other Miraculous holders. But she has to act fast or she'll lose Adrien, Chat Noir and Paris forever. (Request fic for Chat Blanc and Miss Fortune. AU. Dark.)