Killer Peter (en) follows the story of Peter, an elderly and retired assassin who lives a quiet life running a small ramen shop. However, his peaceful days are shattered when members of his former syndicate, a powerful crime organization, come to kill him and his family. Forced to pick up his old skills, Peter reveals he is still a deadly killer, using his experience and cunning to fight back against the relentless wave of assassins sent after him. Readers enjoy the series for its intense, well-choreographed action scenes, the satisfying contrast between Peter’s humble, gentle old-man persona and his brutal combat abilities, and the gritty, survival-driven plot that blends family protection with revenge.