Discovered a school girl waiting alone at the station, casually circling around her without raising any suspicion. Boarded the train with a friend, positioning ourselves right in front of and behind her. Casually started touching her with the back of my hand, pretending it was due to the train's movement. Gradually lifted her skirt, which she noticed, and she showed slight resistance but quickly tried to compose herself. Taking advantage of her momentary relaxation, I boldly inserted thick fingers directly into her bare pussy. She desperately tried to push my hand away, but the train was packed and she couldn't move—exploiting the situation, I continued fingerfucking her. As I rhythmically jerked her off, her arousal fluid steadily leaked out, and her face revealed a conflicted mix of pleasure and disgust. She quickly fled once reaching her stop, but either way, delicious morning treat.