Picking Up the Pieces (percico/pernico)

It's been five months since the war ended. Two demigods are completely broken after facing tartarus head on. Nico returns to Camp Half-Blood after being banished from the underworld by Lord Hades himself. Percys night terrors have worsen, often waking up half the camp with his agonizing screams. Nico sometimes finds himself not knowing what is real and what is just his imagination. Is he still in tartarus? Or is he on a quest with the love of his life? Together the two make a promise on a certain river of Styx to pick up each other's broken pieces.