Saiki's class goes on a school trip to Okinawa. The rest of the class is excited to go on the trip, but for Saiki, it's just one problem after another. They go to the sauna to freshen up for the first day in Okinawa and the other boys brought in a telescope to look over at the girls bathing sauna and Saiki used his physic abilities to turn the telescope away every time the other boys try to peek at the girls

Saiki was just chilling in the bathe with Kaidou and using his ability in secret