A high school student is visiting an amusement park with an older member of her club, whom she has a crush on. She's thrilled at the prospect of going on this date with the senpai she admires. But on the way home, they see a creepy woman on the train platform, and from that point onward, the girl's head is overtaken by a frightening suspicion...
This is the story of a 
certain girl in high school.
هذه قصة فتاة معينة بالمدرسة الثانوية
Dies ist die Geschichte eines gewissen
Mädchens, die zur Oberschule ging.
Esta es la historia de una colegiala.
Esta es la historia de una colegiala.
Voici l’histoire
d’une jeune lycéenne.
Questa è la storia di una certa studentessa delle superiori...
Esta é a história de uma certa garota.