Dismissed from the hero party for being an assassin, Noah, starts working as a bodyguard for his childhood friend, Princess Rubia. He uses his assassin skills to protect her, but he doesn't want to kill anyone. This decision changes his life and leads to the downfall of the hero party. The story focuses on Noah's growth and the hero's despair. While the hero party appears later in the story, the main focus is on Noah's role as a bodyguard. The story includes elements of revenge and schemes against the hero party, starting around chapter 8 of the bodyguard arc. The assassin arc will detail the protagonist's development and the hero's despair.