It has been 4 years since Gaea had been defeated, and Percy and Annebeth were on there last year of college, Percy had gotten his degree in marine biology and Annebeth in architecture at the New Rome college" Their relationship had only gotten stronger, for 1 entire year Percy had been contemplating proposing but he just couldn't decide when he should.
One evening they were having dinner when Percy started to grin, Annebeth saw this and asked "what are you thinking about" Percy said nothing but he had finally figured out when and where he was gonna propose.
The year was about to end and the graduation ceremonies were being planned, Percy went to the headmaster and told him his plan, the headmaster smiled and said, "I will be sure to get everyone to come then" but he didn't need to because Percy already had that covered and had invited all of camp half blood and new Rome.
The day of the ceremony came and Percy had dressed up for the occasion, but Annebeth made fun of him because he never wore a suit. Before the ceremony started, Percy and Annebeth talked with there friends before they had to go get on stage to get their certificates, but right before they had to go Percy pulled Jason aside and told him what he was gonna do, Jason patted him and the back and said "nice bro, but did you get the ring?" Percy put his hand in his pocket and pulled out a small box and opened it to reveal a beautiful ring, Jason smiled and told him good luck.
Percy had gotten the headmaster to arrange it that they are the last two people to go so when he goes to get his diploma he can propose to her infront of all his friends and family.
Soon it was percy's turn and he couldn't stop smiling, when the headmaster called his name he turned around, got on one knee and asked Annebeth to marry him, she covered her mouth for a second then yelled "YES" she hugged him so tight he said "you hug harder than Tyson" she smiled as everyone cheered and clapped.
After that, the day was a blur for the them, Annebeth couldn't stop smiling and showing of her ring everyone congratulated the two, Percy couldn't stop hugging Annebeth. That night the crew of the Argo two got together and had a party, even coach hedge, his wife, kid, and calypso were there, everyone had a great time and joked about who the best man and who the bridesmaid were gonna be, but Percy knew this was gonna happen so he said, "for me, drum roll please..." they all started to bang the tables finally he said "all three of my boys, Jason, Leo and coach hedge, you all are my best men and I just don't want to decide, but if I had to... it would be me" this seemed really funny to Percy but nobody seemed to find it funny except for coach hedges kid, he couldn't stop laughing either, soon everyone started to look at Annebeth, "oh boy this is a lot of pressure, but I think I'm gonna do what Percy did and nominate piper and hazel, they both have been great friends and I just can't choose" then coach hedge said "don't expect me to make a speech Percy" Percy grinned and said "wasn't counting on it"
The wedding was amazing, Percy and Annebeth moved to Hawaii where Annebeth helped design structures that can withstand any weather or natural disaster, Percy worked as a marine biologist until they had there first kid named Luke, they had two more kids, sally and Paul, and Percy trained all of them how to be a demigod, when there kids turned 14, 15 and 16 a war broke out, the god chaos, and tartauros where trying to rise but the original seven and their kids came to the rescue and defeated them and were granted each one wish, they all looked at each other and all agreed as one that they would all become a new type of god, the protector gods, over the years they made a name for themselves and even were granted a new Olympus except it was smaller and less "grand" as Zeus put it, soon the world was under siege but now nothing could ever beat the guardian gods, after 3 thousand years Leo was starting to fade, calypso had left him and he was all alone, his heart was so broken, he gave up his godly hood and was reborn, Jason and piper both decided they were going to be reborn but together as friends from the start, Frank and Hazel were sadly destroyed 100 years after Jason and piper were reborn they had gone to Greece to try and destroy any chance of Gaea rising again but had gone missing and assumed to be killed
But Percy and Annebeth never separated for all of eternity, even through the highs and lows they defended the earth and lived happily ever after