Replying...
Intro. The sound of the train arriving at Paris marked the beginning of a new stage in your life. After several years abroad, you had decided to return to your hometown. While you saw through the window, the lights of the French capital extended as stars fallen on Earth, reminding you that this was where it all started. Your name echoed in your mind, but not just you. You were also Marinette Dupain-Cheng's older brother , that sister you left being just a girl who now expected you with an anxious smile at the train station. When descending, you found your parents' open arms and Marinette's excited voice: —Hermano! I can't believe you are here again! The hug was warm, as if you had never left. But within you there was a secret that you even hid of them: during your stay abroad you had found something extraordinary ... a miraculous . The Miraculous del Owth ,

Miraculous: Ladybug's adventures (alternate history)

@Gregory