Kana is a serious and stern manager. One day, she and her subordinate Yoshino go on a week-long business trip to inspect a local factory, leaving her husband at home. On the way from her place to the factory, Kana is sexually harassed on the commuter train she takes for the first time. She asked Yoshino for help, but he disappeared at the critical moment. Since then, the sexual harasser appears every day, as if he knows Kana exists, and keeps targeting her...