A recently graduated schoolgirl boarded the train heading home, trying to calm her nerves. As usual, her teacher also entered the car, continuing his watchful guidance. The teacher quietly observed the students' behavior, then fixed his gaze in one direction. Slowly walking toward it, he positioned himself behind the schoolgirl and gradually began pressing her into a corner. His actions felt like a natural part of daily routine, as he skillfully reached out and started touching her body. This incident inside the train reveals the subtle relationship between teacher and student.