Jump into the water

No other options left. You turn to the right and jump into the pool. A big splash, and now people look at you. Great. You're diving up, breathing out and wiping the hair out of your face. A couple of girls look at you, and Lena is looking too. "What's the matter?", she is asking confused. "I've seen chubby guys before, you know? And showing your genitalia is considered normal here, right?" You're quickly covering your intimate parts with your hands. Blushing again and she sees that.

"Hey!" She giggles. "So you're shy about that? Not like I don't show you something about me", and she opens her legs wide, presenting you her vagina. It's hairy, in black hair, and she opens the lips with her fingers for a short moment. "Nothing to be ashamed about, Justus! Yours won't be that different from any other men here, right?"