(OP) My Gym Teacher is An Alien Overlord

Luke could have been a superhero, except he needed to wee but that won't stop him saving the world! Super-exciting, laugh-out-loud funny, and with enough heart to fill an entire galaxy.

Zack and Lara have superpowers. Luke has new school shoes and a burning sense of resentment. He KNOWS that aliens disguised as gym teachers are about to attack Earth but will anyone listen? No. So one dodgy pact with a self-styled supervillain later, and Luke is ready to save the world. He just need to find his trainers.