Annabeth died in the fall, leaving Perseus alone in Tartarus. But before one he meets someone who's very interested in him, setting off a whirlwind of crazy with no end in sight. They ask only one thing of Percy: to Conquer. On Hiatus, a very long one. No big clffhanger at the end so you can read if you want, but don't expect updates anytime soon.

Percy found out his relationship with Annabeth was false. He left camp and was almost killed, only to be saved by Artemis and was placed there by Zues. No guardian No chaos. Real Realistic story. Eventual Pertemis

Percy and Annabeth survived the war and get granted immortality and settle down alone on an island. Well not totally alone. Lemon harem and so on.