FC2-PPV-1666964 continues from the previous work's train exhibitionism theme. Attempting to change seats and check blind spots, the filming is done using a hidden camera. Upon reviewing the footage, it turns out the camera was positioned in a place visible to a middle-aged man, despite Rina believing it was hidden. As a result, she ends up being stared at intensely. The scene captures a sudden, heart-pounding tension, with emotional expressions that viewers can relate to. There's also a sense of relief conveyed, as she manages to leave without being approached. An unexpectedly intense and thrilling moment filled with suspense.