"We're in this together until the very end." Years have passed since that promise was made. As a duo more in sync than anyone else, the two of them left behind numerous legends in the mafia underworld. But one day, the organization's information was leaked by someone. There was only one traitor. On the documents the boss handed over, an unbelievable name was written. "Guest" "Iori." "You take care of them." Iori clenched his fists without a word. He didn't want to believe it. There was no way the partner who had been by his side longer than anyone else would betray him. Even so, the order was absolute.