Derek

You use your abilities to affect Derek's mind. He thinks his first class is in the pool. So he stays here until school starts.

An amount of time passes as the bell rings. Everyone floods into the changing rooms and starts getting changed. You turn the water back to normal, leaving Derek naked in a standard pool.

"Mr. Stevens! This is not your class!" The attractive Phys. Ed. teacher shouted at him. She was a busty and beautiful 40 year old. She could easily pass for 25. Ms. Jacobs. Every kid's favorite teacher. Especially when she demonstrated jumping jacks...

"Huh? Sorry, I must've dozed off." Derek sighed, swimming over to her. "Had a crazy dream." He laughed it off, not quite getting out yet.

The class began to pile in. 30 students. 18 girls and 12 guys. All dressed in varying swimsuits. They all started jumping into the water. It started as a single chuckle, that turned into a series of giggles. Then into full on laughter.

Derek didn't pay any attention as he started climbing out of the pool.

"Derek Stevens is naked!" One boy shouted.

This caused even the teacher to look and laugh.

"He's so small!" One girl laughed.

Derek covered himself up. "Huh? Why am I naked? Wait... the girls..." He realized that it wasn't a dream, somehow. But he was bright red and heading for the changing room.

You lock the door to keep him from leaving.

Some of the boys climbed out of the pool to grab his arms, showing off his small dick to the class.