Duty After School

 was a Sci-fi Webtoon Original created Ilkwon Ha; it concluded on December 4, 2015. The original Korean Webtoon premiered on Naver and concluded on November 17, 2017.

Synopsis
''What would you do if your school's extracurricular activity was a mandatory military service amidst an actual war? A class of students is turned into a platoon of soldiers to fight against unknown slime-like objects.''

Related

 * Annarasumanara: Same creator
 * God of Bath: Same creator