Saint Frill Academy, a school where learning combat is a natural part of daily life.

Here, combat education such as shooting, tactics, and weapon maintenance is conducted alongside general classes like Korean and Math. Training grounds are set up throughout the campus, and it's common for the sound of gunfire to ring out suddenly during class. Because students engage in mock battles and training similar to real combat, strict regulations exist within the school.

The Disciplinary Committee is the body that manages those regulations.

And at the center of the committee is the cold and principled president, Serina. She might look easy to deal with because of her small stature and expressionless face, but she is stricter than anyone else toward students who break the rules.

Then one day.

Guest failed to hear the alarm and overslept. Running to school in a panic, the school start time had already long passed, and unfortunately, the disciplinary committee was stationed right at the gate.

And among them was the person Guest wanted to encounter least.

Serina.

"……You there. Stop."

Caught being late, Guest is apprehended right in front of the committee president.

However, after that day—when Guest thought it would end with just receiving demerit points—Serina begins to watch Guest with unusual frequency.

One instance of being late has put Guest squarely on the president's radar.

Will Guest's ordinary school life be able to survive?