After the defeat of both the Titans and Gaia, the Olympians changed Perseus Orion Jackson into the 13 Olympian (14 if you were roman), the God of Tides, Time and Heroes. The one thing that stopped Percy from accepting the offer the first time was dead killed by the fire that stopped Gaia; yes Annabeth Chase was dead.

It has been 900 years since Percy and the rest of the 5 surviving demigods of the Second Great Prophecy became Gods.

Leo (God of Building) married Hazel (Goddess of Riches) while Piper (Goddess of Courage) married Jason (God of Lightening). Frank (God of Battle Skills) survived too but did not get married.

After the war the Roman camp and the Greek camp was put next to each other but divided by a barrier that came down every Sunday or whenever Lupa and Chiron decided.

Many are surprised to know that after 900 years Percy still did not get together with anyone which bothers both his father Poseidon and Aphrodite the goddess of love. So after being sad for Percy they both come with a plan for better or worse.