Ridiculous fluff!
Percy Jackson, 19 year old Olympic swimmer, was bored. He was in the middle of some boring thing where a bunch of journalists yelled at him.
"Mr. Jackson, how did you achieve this at such a young age?" Some intrusive reporter shoved a microphone in his face. Percy ignored him, and dug in his bag, pulling out a perfect red apple. Fixing his eyes on his target, he shouted.
"Yo, Annabeth! Catch" And threw the red fruit.
The receiver of the apple looked angry at first, and opened her mouth to say something, but then her eyes lit up in recognition.
"So, what do you say Wise Girl?"
"Do you at least have a speech?"
"Of course!" And he cleared his throat. "Annabeth. The first words you ever said to me were "You drool in your sleep". I may not have realized it yet, but I was head over heels in love with you. When I took a bath in the Styx, you kept me sane. You have fought beside me, and saved me countless times. I would do anything for you, which I think I proved when I jumped into the mouth of hell for you. You are smart, brave, drop dead gorgeous, and most importantly, you put up with my blue food. I think the question I am asking you right now is pretty obvious, so will you?"
"Took you long enough Seaweed Brain' She rushed up to him and gave him a kiss.
"Could you explain what just happened, Mr. Jackson?" A reporter said
"I could, but I don't want to. You know what? I don't want to deal with this Styx anymore. I'm retiring." He said, and started to walk away with his fiancee.
"Did you get a ring, Seaweed Brain?"
"Of course I did!" He showed her the ring, a simple gold band with a small blue owl.
"I love you."
"Likewise"
Here is an alternate apple proposal, but with Solangelo.
"You have to eat better, Death Boy!" Nico's boyfriend nagged him. The two of them were 20, too old for camp, but back for a visit. Will needed a break from the stress of med school.
"Fine." He grabbed an apple, and smirked "An apple a day keeps the doctor away, Solace" And threw the apple at him. Will deftly caught it.
"Hey!" He yelled, but then they realized that the whole dining pavilion was staring at them. "What are you all looking at?"
"He threw an apple at you!" An Aphrodite camper supplied
"Yeah! I know. So rude. I don't see the big deal."
"What do you mean you don't see the big deal? He just proposed to you!" Another girl said
"I did?" Nico said, his voice unusually high.
"Yeah. Throwing an apple at someone, Ancient Greek marriage proposal."
"Oh. Whoops" Nico said "What do you say Solace?"
"What?"
"Well it saves me the trouble of proposing"
"Wow. How romantic." Will deadpanned
"Well?"
"Sure, but I want a PROPER proposal."