It's Saturday morning and Ryan is heading to the beach. He gets on the bus, wearing his thong bikini briefs, and sighs when he sees that he has to stand in the aisle, since all the seats are taken. Heading to the back of the bus, Ryan can't believe his luck. Sophie is standing in the aisle, wearing a string bikini. Ryan stops behind her, and looking behind himself, lines up his bare ass cheeks with Sophie's bare ass cheeks. Then he slowly backs his ass across the aisle and into gentle contact with Sophie's bare ass cheeks. Ryan, not knowing how Sophie will react, waits nervously, but instead of pulling away from the intimate contact of bare skin to bare skin, Sophie surprises him by pushing her ass into firmer contact with his own ass. Ryan decides that if she wants to play, he can play as well. He pushes his own ass into tighter contact with Sophie's bare ass, increasing the warmth that their conjoined asses are generating. Three seconds later, Sophie pushes her ass into yet tighter contact with his own ass, and then reaches back and interlocks her arms through Ryan's arms, pulling their backs into tight contact as well. Ryan pulls on their interlocked arms, to further increase the pressure between their bare asses. Sophie, for her part, is thoroughly enjoying the warmth that she is feeling from their bare asses pushing against each other. She has no idea who is behind her, but she is thrilled that her mystery friend appears to be enjoying the intimate contact as much as she does. Sophie glances over her shoulder, and notes that her mystery friend is a boy, and almost the same height and build as she herself is. Ryan is over the moon with happiness, as he now knows that she enjoys the intimate contact as much as he does, and she even escalated things, by interlocking her arms through his arms, and ramping up the pressure between their two bare asses. Unbeknownst to Ryan, they were being watched. What's next for our classmates?