Duty After School (2023)

When mysterious, lethal alien spheres suddenly descend from the sky and begin inflicting heavy casualties across the globe, the South Korean military becomes severely shorthanded. In a desperate bid to bolster their forces, the government conscripts all third-year high school students into the armed forces. Instead of studying for their college entrance exams, the students of Sungjin High School are given military uniforms and rifles, undergoing rigorous combat training under Platoon Leader Lee Chun-ho to fight the bizarre, murderous creatures.