For VISA application, please finish your registration and pay for the registration fee.
Then, please email us so that we can send you a material for VISA application.
For the Visa requirement, please refer to the Visa-Navigator service of the Korean government.
(https://www.visa.go.kr/openPage.do?MENU_ID=10101#this)
Detailed information can be found in the same page if you are subjected to apply Visa.
There are Visa-free countries in entering Korea for a short-term visit. However, visitors without a Visa requirement still need an approval of Electronic Travel Authorization (K-ETA) before the departure. Please consider that it can take more than 72 hours depending on the situation.
(https://www.k-eta.go.kr/portal/apply/index.do?locale=EN)