The Red Thread Rock is giving Yeon and Kihoon one last trial by showing them their past lives’ tragedy that was caused by little Yeon forcing a tie to Kihoon. If they pass the trial, the rock will acknowledge their forced tie as real and the curse of the Red Thread will be lifted and they get their happy ending. If they fail, the rock will purge the curse by cutting their forced tie and erase all of their memories together.
The Red Thread Rock is giving Yeon and Kihoon one last trial by showing them their past lives’ tragedy that was caused by little Yeon forcing a tie to Kihoon. If they pass the trial, the rock will acknowledge their forced tie as real and the curse of the Red Thread will be lifted and they get their happy ending. If they fail, the rock will purge the curse by cutting their forced tie and erase all of their memories together.