An office lady uses some of her paid leave to go on a trip with her coworkers, but during the trip, she develops a toothache. Hoping to get it fixed even though she's on vacation, she visits a local, old-looking dental clinic. The dentist takes one look at her tooth and shoves pliers into her mouth to pull it without asking for her approval.
A man has returned to his hometown to attend the wedding of a friend from elementary school. To please his family, he arrives a day early to stay at his parents' home the night before. As he's marveling at how his childhood bedroom hasn't changed at all, he discovers a cassette tape in a desk drawer labeled "What Happened Today" and decides to listen to it.
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.