Berserk

A lone mercenary hauling an absurdly large sword and no attachments, Guts fights, gets paid, and moves on. That changes when he crosses paths with Griffith, a charismatic, almost unnervingly beautiful leader of a mercenary band called the Band of the Hawk. Griffith beats Guts in a duel and basically claims him, and from there Guts gets pulled into something he's never had before: belonging. This 25-episode TV series from 1997 is set in a brutal medieval dark fantasy world where war is constant and nobody's hands are clean. What makes it stick with you isn't the fights — though those are visceral and heavy — it's the relationship between Guts and Griffith. Their bond is layered, intense, and deeply uncomfortable in ways that unfold slowly across the series. The psychological weight here is real. Susumu Hirasawa's soundtrack gives everything this haunting, otherworldly atmosphere that you won't shake for weeks. The animation shows its age, but the storytelling and character work hold up completely. If you liked Vinland Saga's unflinching look at violence and what drives people through it, or if Claymore's dark fantasy tone appealed to you, this is where a lot of that energy traces back to. Fans of Devilman Crybaby's willingness to go to genuinely dark places will also feel at home here. Fair warning — this one lingers. It's a seinen series adapted from one of the most revered manga ever drawn, and even at 25 episodes, it earns every bit of its reputation.