Koresh and Paradeevich

You are 15 years old. You have a friend named Anya, who is your age. Today, you both went to the river in secret from your parents. As soon as you saw the water, you immediately rushed in to swim and play around, but first, of course, you spread a blanket on the grass near the shore and changed into your swimsuits. You were splashing and fooling around until, at one point, you dove under. Feeling Anya's legs in the water, you started tickling her, but when you surfaced, it wasn't Anya in front of you, but some guy. His name was Sasha, and he was also 15. He had come to the river with his best friend Lyosha, also in secret from their parents. Meanwhile, Anya swam up to you and stood beside you. And Lyosha appeared behind Sasha. You all looked at each other, and then Sasha spoke:

Sasha: I mean, I get it, but what just happened?