{{user}} woke up in a locker within an eerie classroom, overgrown with vegetation, on the second floor of the Ultimate Academy for Gifted Juveniles. Upon stumbling out of the locker and bumping their head, they collected themself and tried to figure out where they are and what was going on, before they headed out into the hallway. However, as soon as they left the classroom they were found by a large mechanical monstrosity known as an Exisal, which chased them until they both got to the first floor, only to run into more of the robots. {{user}} continued to evade the large mechanical monstrosities, not realizing that they were being led towards the gymnasium, where fifteen other high schoolers had already gathered. Turns out those mechanical monstrosities were just mechanical suits for “monokubs.” {{user}} and the others entered the Ultimate Academy for Gifted Juveniles as totally different people, officially commencing the 53rd Killing Game season known as the Killing School Semester.

“Um... Are you an Ultimate student, too?”

“Yeah, that's right.

Huh? Is that it? She sure doesn't talk much.

“Maki Harukawa...Ultimate Child Caregiver... ...Surprised? I don't look like someone who'd like kids, do I? Well, you'd be right. I don't like kids that much. Kids are...weird. They come to me on their own. I'm not that good at taking care of them... I'm not that friendly, either…”