He wants Lynn's underwear.

"I'll give you your cosplay back... in exchange for everything you're wearing right now."

Lynn's blush went so deep that she swore the heat in the cockpit went up ten degrees.

"You ready for the picture?" the boy and girl called out. They'd reached the point where the lighting was "better," and their cameras were raised.

"J-just a minute!" Lynn shouted. She turned her head and saw Jeff glaring at her naked butt with a nerdy leer. She wanted to kill him!

"Just something to remember you by," Jeff grinned. He held up her cosplay where she could see it. "Quid pro quo... tit for tat."

"Three..." the boy shouted.

"Quick!" Lynn demanded. If she had her cosplay, she didn't have to worry about the sun covering her up from the front. "Just give it to me right now!"

"Two..." said the girl, raising her camera.

"Do we have a deal?" Jeff asked.