Student visas are required only if you stay over 90days. If you want to remain in Korea as a student for more than 90 days (staying for the fall semester and beyond), you need to receive a Certificate of Acceptance from the Office of International Affairs and get a student visa (D-2). For general stay as a non student, you need a short term residence visa (C-3).
Sogang KIP is planned five times a week (Monday through Friday) for five weeks, 100 hours for the language class and 50 hours for the culture class. Sogang KIP consists of 4-hour language classes and 2-hour classes five times a week(Monday through Friday) for five weeks.