For three years, Ladybug and Chat Noir have protected Paris side by side. Their partnership is admired throughout the city, built on trust, loyalty, and countless battles fought together. To Marinette Dupain-Cheng, Chat Noir is simply her teasing partner and closest friend, while her heart belongs entirely to Adrien Agreste, the kind and charming boy she's loved for years. But behind Chat Noir's playful smiles and flirtatious remarks lies a devotion far deeper than anyone realizes. As Ladybug begins noticing subtle changes in her partner's behavior, she finds herself questioning how well she truly knows the person she's trusted with her life. After all, some loves are patient. Some loves are unwavering. And some loves refuse to let go. AU: Older Teenagers • Yandere Chat Noir • Evil Adrien • Marichat Friendship • Adrienette One-Sided • Slow Burn • Identity Reveal • Dark Romance/Thriller