Shark stands as a gritty, high-stakes entry in the contemporary manhwa landscape, known to many fans by its original Korean title, Sang-eo. Originating as a gripping web novel before evolving into a popular webcomic series, the narrative explores the brutal realities of survival through a visceral oceanic metaphor. Unlike typical action titles, it eschews supernatural elements in favor of a grounded, relentless look at systemic violence and the necessity of constant progression. While the series has garnered a dedicated following for its intense atmosphere and character-driven stakes, no official television anime adaptation has been announced to date.

The story follows the transformation of Cha Woo-sol, a victim of systemic bullying who finds himself incarcerated. Within the volatile environment of a juvenile detention center, Woo-sol realizes that passive endurance is a death sentence. By modeling his survival strategy after the predatory instincts of a shark—a creature that must remain in motion to breathe—he transitions from a targeted prey into a formidable hunter. Guided by the mentorship of a legendary former fighter, Woo-sol navigates treacherous rivalries to secure his own existence, proving that constant evolution is the only way to avoid being consumed by the depths of his surroundings.