Fun Miraculous AU prompt
Every time Ladybug purifies an akuma, she absorbs the dark energy from it. Hawkmoth turns negative emotions into dark energy, and when she de-evilizes it, it doesn’t go away, it just gets stored back into her as negative emotions. After a while, it just piles up more and more, so much until she feels like she’s going crazy absorbing other people’s past grief, anger, fear… but of course she doesn’t tell anyone. Because who else can purify the akumas? It’s her duty, she’s the only one who can.
Well, not really. Turns out there’s only one person who has enough positive energy (enough love) for her that he can purify her and turn those emotions back into destructive power. And that is the source of his Cataclysm.