Thanks guys! I was under the impression one can go without being called, tho my source is other korean webtoons DragonDarling
It depends on the situation. Usually once you're at the age of 18, you will be called for enlistment but if you wish to pursue education (going to university), you can get permission to delay it, and get enlisted once you get your degree.
When is it my turn!!!!!!! They're so fricking adorable