We decided to go on a school trip with our idol Mayu-sensei. Of course we're looking forward to the trip, but our real goal is to see her big, bouncy boobs! We peek at her changing clothes, take a mixed bath, and gradually get closer to her. After playing lots of naughty pranks, Mayu-sensei got a little in the mood, so we showed her our rock-hard dicks, and she bashfully...