Killer Peter has emerged as a significant title within the modern manhwa landscape, originating from the competitive South Korean digital comics scene. Often recognized by its original Korean title, Kill-eo Piteo, the series explores the intersection of high-stakes criminal warfare and unexpected second chances. While fans frequently discuss the potential for future television anime adaptations, the story remains anchored in its visually striking webcomic format. The narrative centers on an aging hitman who trades his lethal profession for the peaceful solitude of a used bookstore, only to find himself betrayed by the very syndicate he served for decades.

Peter finds his existence upended when a near-fatal assassination attempt forces a supernatural reversion of his body to his prime teenage years. Armed with his veteran tactical expertise and the peak physical prowess of his youth, he abandons his quiet life to dismantle the Glory Club. As he navigates this vengeance-fueled path, he must confront his former allies while mastering the vulnerabilities of his younger form to settle the score once and for all.