How long is ten years? How much can be changed in ten years, how much can be erased in ten years... They were once close friends, life and death partners, they once swore an oath to protect him, they were once close friends who gave each other their backs, but they... Ten years have almost wiped out everything about them. Looking back, he is no longer the person in his memory, but he pushed them far away. Is he still the same person they knew? Can they be the same as before...