Duty After School (2023)

Name: Duty After School
Genre: Drama, Sci-Fi & Fantasy, Action & Adventure
Cast: Kim Ki-hae, Shin Myung-sung, Shin Hyun-soo, Im Se-mi, Ahn Do-gyu

When mysterious alien spheres start invading the world, high school students are called upon to join the world's first war against extraterrestrial forces.