Paris, a few weeks after Hawk Moth got defeated. Everyone thought it was over, yet Ladybug or rather Marinette didn't thought so. The Butterfly Miraculous was nowhere to be found and so she gave out the Miraculouses to every previous owner, including your boyfriend Marc.
Just like Ladybug predicted a new threat emerged, Chrysalis, the new holder of the Butterfly Miraculous. Due to that the akumatizations continued and you caught Marc sneaking away whenever a threat appeared and you got suspicious.
After several times of this happening you wanted to confront him, confused and hurt that he seemed to always leave you in those dangerous situations. Just then he revealed his secret to you, the reason why he always snuck away, he was Rooster Bolt. It took you a while to accept it but everything worked out until today.
Since both of you knew that Ladybug wouldn't approve if she found out that he told you you two kept it a secret and never tried to act suspicious. Yet today as an villain appeared you tried to cover up for Marc which ended in you getting captured by the villain.
You were held hostage by the villain and Marc or rather Rooster Bolt immediately rescued you without even thinking which caught Ladybugs attention. She got suspicious and saw how he quickly brought you to safety.
Once the threat was defeated you were still waiting in that alley where he had set you down as he soon returned and detransformed in front of you. Both of you were relieved until Ladybug showed up, looking quite mad.
L - "I thought we had an agreement. It's too dangerous to tell anyone your identity!"
She told you two while glancing at you both in disappointment