I can't breathe, can you help me

Chapter 1

"Pound it." Ladybug and Chat Noir said, then fist bumped each other for a job well done in getting rid of the newest akuma.
"I've got to go, bug out." Ladybug said, when they heard a beeping noise from her earrings, then she swung off the top of the roof they were on with her yoyo and found a spot where nobody could see her.
"Tikki, spots off." Ladybug whispered, a few seconds later ladybug was back to being her civilian self.....Marinette Dupein-Cheng, and floating in front of her was her Kwami....Tikki.
"Marinette, are you ok, you look paler than usual?" Tikki asked, floating closer to Marinette's face, Marinette smiled at her friend.
"I'm fine Tikki, let's see if Adrien is ok." Marinette answered, she opened up her pocket book, that was for Tikki, the kwami sighed with a small shake of her and flew into the pocket book, Marinette closed the pocket book and walked out of the alleyway they were in. As soon as they were out of the alleyway, Marinette started walking towards the place she last saw Adrien Agreste, but as she took a couple of steps forward she fell down to the ground coughing.
   As Chat Noir or in his civilian self Adrien Agreste, used his baton to help him jump from roof to roof, he was headed in the direction of where his friends last saw him, as well as a place for him to change back into his civilian self. Though as he continued on, he saw one of his friends....Marinette on the ground on her hands and knees, afraid that she was hurt Chat Noir turned his direction towards Marinette.
"Princess, are you alright?" Chat asked, as he walked closer to Marinette, but the dark-haired girl didn't answer, once he was standing right next to her, Chat could hear Marinette coughing.
"Princess?" Chat asked, bending down to look at Marinette's face, her face was extremely pale and it looked like she was about to pass out from lack of air.
"Try to breath." Chat whispered, placing a comforting hand on her shoulder, unfortunately Marinette wasn't able to do that because her coughing got worse.
"Princess, if you keep coughing like that, you're going to end up coughing up blood." Chat said, but Marinette's coughing only got worse and Chat was correct Marinette did cough up something but it wasn't blood.
"Are those red carnation petals?" Chat asked, confused as to why Marinette coughed up flower petals, then he gasped as he remembered today's akuma, it was a love based one again, and it was using flowers as weapons, Marinette must've gotten hit by one of them. It didn't explain why she was coughing up flower petals, or that paticular flower, but it shouldn't have mattered if Marinette had gotten hit by one of the akuma's flowers, Ladybug's, miraculous ladybug charm should have fixed all the damages caused by the akuma.
"I'm going to take you to someone who might be able to fix this." Chat said, Marinette nodded her head weakly, Chat helped her stand up then he picked her up.
"Hold on." Chat said.
"Ok." Marinette whispered, Chat extended his baton and once again he was jumping from roof top to roof top, but this time he was heading in a different direction with a slowly falling asleep Marinette in his arms, once he reached his destination, Marinette was asleep, Chat gently knocked on the door. A minute or so later the door opened revealing an elderly chinese man.
"Chat Noir.....certainly a surprise." The man paused in the middle of his sentence as he looked at the asleep Marinette in Chat's arms.
"You've got to help her, Master Fu." Chat pleaded, at the same time they heard a beeping noise coming from Chat's ring.
"Lay her down, then hide." Master Fu said, Chat nodded his head and walked inside, he laid Marinette on the bed in the corner of the room, then he hid in the next room.
"Plagg, claws in." Chat whispered.
"Camembert." Plaqq groaned.
"Here, and eat it quickly." Adrien whispered, handing a piece of the cheese he had in his shirt pocket to the kwami.
"Fine." Plagg said, then he gulped the entire piece down.
"Plagg, claws out." Adrien said, Chat exited the room and saw Master Fu sitting down next to Marinette.
"What is the young woman's name?" Master Fu asked.
"Marinette Dupein-Cheng." Chat answered.
"Why did you bring her here?" Master fu asked.
"I saw her on the ground, I went over to check to see if she was alright.....she was coughing....a lot, the coughing didn't stop eventually she coughed up....flower petals. I was confused as to why Marinette was coughing up flower petals until I realized that today's akuma was attacking people with flowers, but Ladybug's miraculous ladybug charm should have gotten rid of all the effects the akuma left behind, so I brought her here, I thought maybe you'd be able to help her." Chat explained why he brought Marinette here.
"I can tell you what's wrong with her, but it's beyond my abilities to help her." Master Fu said, with a frown.
"What's wrong?" Chat asked.
"She has the Hanahaki disease." Master Fu answered.
"The what disease?" Chat asked, confused.
"Hanahaki disease." Master Fu answered.
"What's that, and why is it above your abilities to heal?" Chat asked.
"It's supposed to be a fictional disease but it seems the akuma has brought it to life....at least for Marinette, someone can only get this illness if they have unrequited love, the illness causes the victim to cough up flower petals while a flower itself will grow in that person's chest. It's beyond my abilities to heal her because the only way to cure Hanahaki disease is for the victim's love to be returned.....if not within a month or two the flower will be fully grown....crushing the victim's heart and lunges.
"Are you saying Marinette could die from this?" Chat asked, while panicking on the inside.
"Yes, unless her unrequited love, starts to love her in return....but Chat, I wouldn't push her to tell you, her crush or force said crush into loving her, it could make matter's worse." Master Fu answered.
"But this was caused by the akuma, why didn't Ladybug's, miraculous ladybug not work?" Chat asked.
"Love is the most powerful force on earth......and today's akuma was a woman who was suffering from a broken heart am I correct?" Master Fu asked.
"Yeah, from what little details Ladybug and I got from the woman, she had just gone through a break up but instead of telling her, the ex gave her flowers that would indicate that he was ending the relationship." Chat answered.
"A broken heart just doesn't go away as quickly as it begun, I think the intent of the akuma stuck to Marinette and it's not letting go, only love will be able to save Marinette now." Master Fu said.
"Marinette was coughing up red carnation petals, what is the meaning behind a red carnation?" Chat asked.
"It means my heart aches for you, and admiration." Master Fu answered, before Chat could say anything the two of them saw Marinette slowly open her eyes.
"Chat, where am I?" Marinette asked, she knew where she was but she couldn't let on that she knew where she was or that she knew that the man sitting next to her was Master Fu.
"Remember earlier, you were coughing up flower petals, so I took you.....to a specialist that I know of." Chat answered.
"Thank you, but why was I coughing up flower petals?" Marinette asked, she looked over at Master Fu, the man sighed and repeated everything he said to Chat, to Marinette.
"Oh." Marinette said, once Master Fu had finished explaining and answering all her questions.
"I suggest you go back to your friends and family, I bet they are worried about you, and Marinette get some rest." Master Fu said, standing up, Marinette slowly stood up.
"I'll help you." Chat said, when Marinette stumbled a little.
"Thank-" Marinette was cut off with a coughing fit, when it ended she had a handful of petals in her hand.
"Sorry." Marinette whispered.
"There's no need to be sorry." Master Fu said, then he held out a trash can, Marinette threw away the petals.
"Let's go." Chat said, Marinette nodded her head and the two left, with Chat carrying Marinette.