Aya Koizumi tries her hand at being a bus guide! "This tour is graded, and you're free to masturbate while judging, but secretly filming your crotch is prohibited!" The bus departs, and she excites the passengers by masturbating using the microphone! Unable to hold it in any longer, she urinates in the bushes and returns to the bus, only to be hijacked by a man with a knife. She is forced to crawl on all fours and move back and forth repeatedly inside the bus, and is given a brutal blowjob until she ejaculates! The culprit gives a signal...