This one is PercyxSilena and is off of Rain.
It was a rainy day. Percy was walking through the camp. Annabeth wasn't at camp yet. She decided to stay with her dad for a while. The camp like usual wasn't being rained on but Percy wanted the rain to come through. The perfect weather all the time was starting to annoy Percy. He wasn't paying attention where he was walking and he crashed into someone. They fell to the ground and Percy immediately reached to help them up. He was matched with a set of blue eyes.
"Silena! I am sorry! I didn't mean to really!" Percy said to Silena. He helped her up.
"It's fine Percy, you didn't see me, You just weren't paying attention!" She said looking down.
"No! I am seriously sorry, and I just noticed, your eyes are a really nice blue!" He told her still obsessed with her eyes. In them he saw a flash of Joy in her eyes after he complemented them.
"Yours are really nice too!" She said and Percy found himself blushing. They just stared into each other's eyes for a while. He was still holding her hand from helping her up.
What happened next neither off them knew what compelled them to do. Percy slowly started to kiss Silena and she kissed back. Soon enough, it became a full rough kiss. Silena's hands were tangled in Percy's hair, Percy's hands around Silena's waist. When they pulled apart they both realized something. They both had thought they loved someone else, Percy with Annabeth, Silena with Beckondorf, but now they knew the only people for them were each other. They kissed again, and neither of them noticed that the rain had started to pour on camp half-blood.