Escalating one-on-one martial arts combat is the show's actual content, not a component of a larger, more complex plot.
Specific martial arts moves and physical feats are treated with the same seriousness some series apply to power systems.
A core, recurring feature of the show rather than occasional — know this clearly before starting.
Overwhelmingly fight-heavy — the show is built around escalating martial arts combat and treats plot as secondary to fight choreography and physical spectacle.
Consistently and intentionally graphic throughout — this is a core, recurring feature of the show's identity, not an occasional element.