Percy's POV

Nico and I ate breakfast, and then decided to go for a swim. We hopped up the wooden stairs and walked into our smallish bedroom. I walked over to the duffel bag neither of us bothered to unpack last night. I rummaged around inside of it for a couple seconds before I found our swimming trunks. I stood up and handed Nico his black and white ones, and headed to the bathroom to change into my light blue ones.
When I was done, I walked out of the bathroom and almost ran into Nico, as he was coming out of the bedroom across the hall. He was shirtless, and I could see his prominent 6-pack. He had a towel wrapped around his neck, and after staring for abut 3 seconds, I realized, he had 2. Mine, ad his. I reached out to grab mine from around his neck, and he tensed, and then, seeming to realize what I was doing, snatched my towel and handed it to me. "Percy, I don't even know why you need a towel." He says, rolling his eyes. I just looked at him, and said, "Nico, do you think we really need people screaming and running away from us at the beach, because of my amazing ability to stay dry under water?"
He looked at me, and rolled his eyes again. He stalked down the hallway, and I could hear him whisper "Bigheaded much?" sarcastically. I scoffed, but followed him anyway.
When we got to the beach, I decided to prank Nico. I ran into the water, and dove down as far as i could go in the shallow water. I called for the nearest shark, and made him promise not to hurt anyone. Then I told him my plan. It was foolproof. Unless Mr. Shark head decided to mess up, and bite his toe off or something, but since i was here, that was unlikely.

Nico's POV

I saw Percy run into the ocean, and a few seconds later, sink to the bottom. I shook my head, dropped my towel, and climbed into the vast, blue-green sea water.
I floated on my back in the ocean, with my hands behind my head. Percy sure has been gone for awhile now, i thought aimlessly. I closed my eyes, and absorbed the sun. I didn't even know why i tried to get a tan. It would be gone by morning. Maybe i thought it would make Percy like me more, subconsciously. I don't even know why i tried. To Percy, all i was, was a brother, a friend. Nothing more, unfortunately. Nothing so small as a little more melanin.
Just then, I felt something rub against the bottom of my foot, and i found it hard to keep in the squeak. It tickled. It was sleek, and rubbery, and felt like, wet, cold, rough, but smooth at the same time, but oddly enough it felt like skin.
I jumped up as fast as i could, which was not very fast, thanks to the emptiness of the sea. I looked around frantically for what had touched me. It could be anything. A sea-serpent, a hippocampi, and, I sincerely hoped it was the latter.
After searching for a couple seconds, i found a triangle shaped object floating above the water, and it was coming towards me! "Percccyyy! I think there's a shark here! Come tell it to be nice! "
I saw Percy pop his head above water, but he looked muffled. He didn't hear me, and dove straight back under the water. I took a couple steps back, and felt a sharp sting in my food. I looked down, and saw crimson liquid flowering from somewhere below my foot. then i realized, it was my foot. I must've stepped on a shell or something. I saw the shark, very briefly. I twas coming towards me, at an alarming rate. It must've smelt my blood or something. I'm screwed.
It was 10 feet away...9...8...5...4...When suddenly, something splashed right infront of me. Between me, and the shark. Its shouted at the shark, and the shark, if this is even possible, looked frightened. It took me a couple minutes to realize that the figure was Percy, and he had shouted at the shark to leave me alone. He turned around and pulled me into a tight embrace. He stuck him head into my neck, before wrapping an arm around my back and dropping one down to my knees before picking me up.
"Percy, you saved me...thanks." I say, very quietly. He tightened his grip a little and gave me a weird look. "Well, i couldn't let my best friend be eaten alive, now could I?''
I felt a twinge in my chest at his words, and did all i could not to wince. I smiled, and curled up into his chest, savoring the moment, since it was all i could do at this point