Prompt: Adrien has an old love letter written to him from an unknown person. He starts comparing all the hand writing of people in his class. He eventually finds his princess.

Adrien was laying on his bed, a frown. In his hands, he held a worn heart-shaped card. Delicate writing spoke out to him, love pouring out of every word. He could feel a flutter in his heart as he thought, someone found his letter and responded. Some cared enough to write him back and not as a crazed fan. It was like this person knew him. But there was no name.

Nothing.

He wasn't able to tell this person how happy he felt. Like someone actually cared about him. A sudden thought struck his mind. He wrote his note in school and threw it away there to, so the responder HAD to go there. A determined smile came into his face.

"I'm going to find them Plagg."

"Whatever kit."

Adrien was early to school, eager to start looking for his mystery writer. He went up to Rose first and put in an easy grin despite his nerves.

"Hey Rose, Juleka."

"Adrien." Juleka nodded at him while Rose wavered happily.

"I was wondering if I could check the homework, I didn't understand a section." Birth girls happily helped him but neither had the handwriting he was looking for. Next he walked to Alix who gave him a strange look but showed him her handwriting as well. Nada.

Then Adrien put into consideration that it could have been a guy and walked up to Nathanael with a shy grin. Nathanael opened his notebook but a piece of paper fell out. Adrien picked it up and paused. It was Marinette. She was openly laughing and every detail he picked out, Adrien never noticed before. She had freckles? Had he lips always been so full and kissable- Wait what?! Bad Adrien no thoughts like that! Marinette is just a friend!

A very kissable friend...

Shut up brain!

It sounded oddly like Plagg.

"This is really good." Adrien said, handing it back to him.

"Do you think she'll like it?" Ignoring the fiery pit of jealousy forming, he nodded and gave a forced smile.

"Absolutely. Maybe you should color it too." Nathanael nodded to himself before writing out a small sentence.

"So why are you checking everyone's handwriting?"

"I got a letter but it wasn't signed. I'm trying to find out who it is."

"And you think he or she is in the class?"

"I'm almost positive."

In the end it wasn't Nathanael and by the end of the morning he had asked everyone. Even Chloe and Sabrina. No one matched. Nino and Alya shared a knowing look but wouldn't tell him what it meant. He had an idea that maybe they knew who wrote the letter and are refusing to talk to him about it. The bell rang and Adrien sat down dejectedly and rested his head in his arms. The door flew open and Marinette rushed in, panting.

"I'm not late!"

"Ms. Dupain-Cheng, please take your seat. I'm giving you a freebie from all your effort this week." The teacher said softly. Marinette nodded gratefully and took her seat beside Alya.

Marinette! I haven't asked Marinette!

Adrien suddenly paused at the thought.

What if it is Marinette? Do I like her like that? She's attractive sure and has an amazing personality but I am head over heels in love with LadyBug...

"Mr. Agreste, if you would please pay attention then maybe you would be able to answer this question." A voice rang, causing him to jump and flush.

"Sorry Madame." Adrien felt a small tap on his back and turned around to see Marinette looking at him worriedly, with the eyes she usually gave Chat Noir. His heart gave a violent flutter as he noticed that yes indeed there were freckles that decorated her cheeks and the bridge of her nose. How did he not notice? Her cheeks started turning a bright pink and he gave a wavering smile. How did he not notice he was falling head over heels for the shy girl behind him and the loud, expressive girl to Chat Noir?!

"Are you alright Adrien?"

He nodded at her, unable to form words at his new revelation. She gave a timid smile back and pulled out her notebook. He glanced down and nearly fell over. Clean, cursive handwriting. Perfect structure and form. Just like the heart shaped note he recieved.

Oh my god...its Marinette! She responded to my letter. Now that I actually process it, she sorta looks like Ladybug, just add a mask and a yo-yo and we're good to go. But how can shy, stuttering Marinette be Ladybug?

But would it really be bad if she was? Honestly, no it wouldn't. In fact, that would be amazing!

"Hey Mari," he whispered making her jump and flush a red. So cute!

"Y-Yes?"

"Can I talk to you after school?" Her cheeks reddened and she nodded. He grinned despite himself and turned back around. Marinette let out the breath she held and sighed.

School ended fairly quickly and Adrien waited outside of the class with a nervous tapping of his foot. Marinette walked out with Alya and smiled nervously at him and Alya gave her a thump on the back before walking away. Adrien led her to the library, Marinette tugging on her braids. They sat down in a chair away from all wandering eyes and he sighed. How should he start this...

"Ok Mari, relax I just wanted to talk." He chuckled at her tense shoulders. Marinette huffed and crossed her arms, pouting lightly. Adrien grinned and shook his head. Reaching into his backpack he pulled out the slightly worn card. Marinette's eyes widened and a pale hue came across her face.

"I got this note in the mail on Valentine's Day. But nobody signed it." Marinette slapped her forehead and grumbled to herself. Adrien gave a soothing smile and rubbed her hand.

"Hey it's ok. You wrote it didn't you? You answered my note?"

Marinette started flushing a dark red and nodded meekly. "I'm sorry." She whispered.

"What are you sorry for?"

"I know you don't like me like that and I'm completely and utterly embarrassed." She buried her face into her arms with a whine.

"Are you sure about that My Lady?"

Marinette froze and her shoulders tensed immensely. She slowly looked up with wide eyes and Adrien gave a nervous smile.

"Chat?"

"Hey princess." Her eyes widened even more.

"H-How?"

"I guess I finally opened my eyes." Marinette blinked and shook her head. She seemed to be scolding herself. Suddenly Plagg came out of Adriens jacket making Adrien yelp. Marinette jumped in shock before cooing.

"Awww, he's so cute!"

"He's an annoying asshole." Adrien deadpanned. Marinette giggled and opened her bag.

"Come on Tikki." A red Kwami stepped out before waving at Adrien. A second later she was tackled by the black kitty Kwami. Marinette suddenly looked at Adrien in anger.

"What if I wasn't Ladybug! You could have blown your cover!"

"No. If you weren't Ladybug the. I would have complemented you again and again." He said, nudging Marinette's elbow. She giggled and rolled her eyes.

"Cheeky Chaton."

"Only for you princess."

A/N: and done. I might do a follow up with this one and have their relationship develop.