There is a couple school cafeterias on campus, but this one is the main one on the second floor of the Student Union Building.
Its called Love Room 사랑방!
There are usually 4-5 different options you can choose from that vary in price that change daily. You can go and look outside at what the menu is. They is 1-2 soup options (top row), 2 regular (typically Korean) food options (middle row, The Dish), and then 1 Noodle box. They give a lot of food and it is only around $3!!!
You can go inside and pay on a self service machine, at the counter, or with card right before you get your food. Then you get a tray and utensils and go down the line, school lunch style. This made me feel like a Korean student in a Korean drama!!
Here are a couple meals I had. This was rice cake dumpling soup (떡만두국). They always have a few side dishes to take too.
This one was Omerice (fried rice with sauce).
It is super fast, easy, and a cheap meal to get with friends or by yourself. (In Korea it is totally normal for people to eat alone too). I regret not going earlier, I only decided to visit towards the end of the semester and went a couple times.