Mesu Nochi Torare - Season 1

Reiko and Shintaro, a couple serving as student council president and vice president, are overseeing preparations for the cultural festival. While checking the campus, a student asks them to sample a festival drink. Soon after, Reiko experiences sudden arousal and leads Shintaro into a classroom designed as a dark maze. Inside, they become separated. Upon reuniting, Reiko, overwhelmed by her urges, allows Shintaro to satisfy her desires, only to discover the person with her is not Shintaro, who had already exited the room. Later, Shintaro observes Reiko behaving strangely and, unaware of the incident, seeks advice from another council member, Misaki. They attribute Reiko's condition to festival-related fatigue and plan a group trip to an amusement park. On the day of the outing, Misaki fails to appear. Reiko then receives an email containing an image that shocks her, revealing what has happened to Misaki.