EnchantedCAT13
The main crew has grown to into 15 year olds, and at some point Marinette couldn't hold it in and told Adrien the truth of his father. All of it. Adrien was destroyed finding out his father was a supervillain, and that Marinette withheld that information from him so he broke up with her. Adrienette ended. But sometime in between, the new kid shows up.
But while all of this was happening, Felix figured out that he and Kagami were being targeted, because Ladybug got akumatized and she almost gave up their rings until Cat Noir got sense into her and she rejected the akuma. Felix waste no time. He had to spare His and Kagami's life by hiding away what kept him, Kagami, and Adrien alive.
Felix is not sure though. He could give it to Ladybug, but she might get akumatized with how broken she is by her break up with Adrien. He could try his mother but doesn't know if she's ready to know he wields the Peacock Miraculous. Felix is in a tough spot. No where to go.