Go to http://international.hufs.ac.kr > click on “Courses”
Go to http://international.hufs.ac.kr > click on the “Course Registration” link (or visit the main https://hufs.ac.kr page and click on the blue circle on the left). You'll get a page that looks like the image below (Note: This is similar to, but NOT THE SAME AS, the regular student portal).
ID: Check your student ID card for your student ID number (e.g., 201985XX)
Password: Date of birth (YYYYMMDD)