A dramatic webtoon illustration in the exact art style of the manhwa "High School Conquest" (고교정벌), sharp cell shading, clean line art. Modify the reference image by adding exactly three high school students sitting at the three closest desks in the foreground (the back rows of the classroom). These three students, wearing dark blue and grey school uniforms, are turning around in complete shock and terror, looking backward with wide eyes and frightened faces. The rest of the desks in the front rows near the chalkboard must remain completely empty. The green chalkboard on the left wall remains flat, clean, and completely blank. Keep the exact frontal symmetric perspective of the classroom.
