Let him continue exploring
From Create Your Own Story
You push slightly back against him, giving him the signal to continue. With that he covers you partially with his overcoat to keep anyone else from seeing the action and reaches down into your jeans, taking hold of your now slowly stiffening dick. With a deep breath he begins pumping it up and down slowly. Realising things would be pretty boring if you didnt do anything, you start grinding into his front, feeling his own cock swell up against your jeans.
The bus is halfway there, the older man continues to pull your cock back and forth inside your jeans, him grunting softly every so often as you push against him. As the bus starts to reach the college, you feel your balls tighten, you signal that youre about to come by pushing hard against him and you give a soft moan as you cum, sticky fluids covering the inside of your jeans. Quickly he removes his cum-covered hand, pushing it into a pocket and you leave the bus, happy to be in College finally but a bit worried if the cum will seep through the front of the jeans.