Duty After School

 is a sci-fi Webtoon created by Ilkwon Ha. The original webtoon is in Korean.

Synopsis
''What would you do if your school's extracurricular activity was a military service a midst actual war? A class of students are turned into platoons of soldiers in a war against unknown, possibly alien, slime-like objects.''

Related

 * Annarasumanara - Same Creator
 * God of Bath - Same Creator