The opening stretch is a genuine slog. Roughly the first quarter to third of the run leans on an episodic, monster-of-the-week format, introducing and resolving one power-card conflict after another with only minor forward momentum, and the framing device — school life, small-stakes tournament busywork — does little to disguise how repetitive that structure becomes. Once the story locks into its larger conflict and the cosmic war beneath the surface finally comes forward, the pacing tightens dramatically and nearly every episode starts pulling its weight. The show never fully earns back the time spent getting there, but once the larger plot takes hold, it moves with a purpose those early stretches never manage. The bond between the protagonist and his otherworldly partner is the clear emotional spine of the show, evolving convincingly from a reluctant, forced alliance into a real friendship, and the protagonist's growth from a reckless, frequently losing duelist into someone genuinely capable feels earned rather than assumed. The antagonist side is where the writing is most uneven: the later tragic, conflicted antagonists get real psychological depth and some of the better redemption material in the franchise, but the transition between villain groups is abrupt, and an early rival family barely registers before it's replaced. The show also leans on its own version of a plot-armor problem — the protagonist's mid-duel ability to conjure new cards on the spot undercuts the strategic tension the format depends on, turning some climactic duels into foregone conclusions dressed up as comebacks. Supporting characters fare worse still, mostly reacting to the leads rather than driving anything themselves. Animation quality shifts noticeably as the series goes on — early episodes look visibly cheap and rushed, while later stretches get a substantial glow-up, with boss-monster summoning sequences that genuinely land the sense of scale and dread they're going for. The new monster-summoning mechanic gives the show a distinct visual identity, all glowing overlays and dramatic transformations, even when the choreography around it repeats a fairly predictable rhythm of summon, escalate, and defend. Character designs for the more powerful monsters are a consistent highlight throughout, whenever they show up. It's a visually inconsistent show that happens to peak exactly when the story needs it to. The score does a competent job of tracking the show's mood swings — bouncy and upbeat during the lighter, comedic stretches, tenser during rising-stakes duels, and noticeably darker once the corrupting power cards start taking hold of their wielders. Nothing here reaches genuinely iconic status, and few individual cues are memorable outside the scenes they're built for. Vocal performances carry more of the emotional weight than the instrumental work does, particularly in the original-language track; the English dub trims content and softens tone enough that the original track is the clearly stronger way to experience it. This is a show that spends far too long convincing a viewer to stick around before it becomes genuinely good — an exhausting, deliberately immature opening stretch eventually gives way to something legitimately gritty and emotionally weighty, built on a central partnership that earns every beat of its payoff. It's not a start-to-finish must-watch, and the writing shortcuts around its own power scaling keep it from ranking among the franchise's best, but what the show becomes is strong enough to justify pushing through how it begins.