Responses

He's probably 4 or 5 years older than younger dude. Cause if he entered university before military service, then he probably did it before or after his second year, and then he went to a foreign exchange program for a year then came back to korea. Since younger dude was preparing for exam when they met, then he was probably 18 or 19 during the time they met, so younger dude would be 19 or 20 right now. So older dude is either 24 or 25.
So is the older dude also a student? Is he actually 36? I feel like I missed something