Kousaka has a panic disorder that's triggered by trains. His breathing becomes unstable, his pulse races, and his thoughts become cluttered. He tries to keep it hidden from others. One day, while near a station, he experiences an attack. A passerby asks if he is okay, but Kousaka dismisses him, relieved that he was not someone he knew. As the new semester begins, Kousaka and his colleague welcome the incoming students to their field of study. However, one of these new students turns out to be...