Nightmare 1 is the first nightmare in Yandere School.
In Nightmare 1, you play as Akari, who wants to murder both Meisa and Makio. A katana is present at the front of the school for Akari to use against them. Once her mission is complete, Akari will wake up.
- With Tips mode on, Meisa Ito and Makio Sono are both outlined in red.