On the school trip going by night bus, I'm the only boy! While moving on the night bus, secretly excited, a defenseless panty flash suddenly jumps into my sight! Unintentionally getting an erection, I hurriedly try to hide it, but the girls who found my erection all touch and lick it, some even straddle me! Not content with that, they don't let go of my dick in the toilets at the service area or even after arriving at the inn, resulting in a school trip filled with intense sex with my female classmates!