Schedule
| Date | Dead line | Home | Away | Group | Result | Points rule |
|---|---|---|---|---|---|---|
| 09/06/21 07:00 | 09/06/21 07:00 | K3 Gangneung City | K3 Gyeongju HNP | K3 | 2-1 | 2 - 4 points |
| 09/06/21 07:00 | 09/06/21 07:00 | K3 Yangju Citizen | K3 Gimhae FC | K3 | 1-2 | 2 - 4 points |
| 09/06/21 07:00 | 09/06/21 07:00 | K2 Gimpo | K4 Pyeongtaek Citizen | K3 | 3-0 | 2 - 4 points |
| 09/06/21 07:00 | 09/06/21 07:00 | K3 Hwaseong FC | K3 Ulsan Citizen | K3 | 1-0 | 2 - 4 points |
| 09/06/21 07:00 | 09/06/21 07:00 | K3 Cheongju FC | K3 Mokpo City | K3 | 1-2 | 2 - 4 points |
| 09/06/21 07:00 | 09/06/21 07:00 | K3 Cheonan City | K3 Changwon City | K3 | 0-1 | 2 - 4 points |
| 09/06/21 07:00 | 09/06/21 07:00 | K3 Daejeon Korail | K3 Busan Transportation Corporation | K3 | 5-1 | 2 - 4 points |
| 09/06/21 07:00 | 09/06/21 07:00 | xNAT Sri Lanka | NAT Korea | NAT | 0-5 | 2 - 4 points |