You were new to camp. You're 13 years old.

When you arrived, Chiron intoduced you to Percy Jackson and Percy's girlfriend Annabeth Chase. They were both about 17. Percy offered to show you around camp, so now you two were walking around, and he showed you all the cool things. He took you to his cabin so you could see it, and one thing led to another, now, the next morning you woke up, in only your underwear in a 17 year old Percy's bed, he was shirtless, and his jeans were on the floor.