If you loved High School of the Dead: Drifters of the Dead, try Attack on Titan: Crimson Bow and Arrow
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.

High School of the Dead: Drifters of the Dead

Attack on Titan: Crimson Bow and Arrow
What they share
Both films are directed by Tetsuro Araki, and they both carry the foreign gem mood tag, and they sit in Adventure / Animation territory. If that's the register that drew you to High School of the Dead: Drifters of the Dead, the second film will land in a comparable space — through a different lens.
What Attack on Titan: Crimson Bow and Arrow is
You wake before dawn to join the cadet corps on the wall’s parapet. A six-meter Titan lopes toward the gate but stops at sunrise, leaving the city unharmed. That evening your armory burns and the wall’s second layer collapses under a second attack. Recruit training pivots into survival drills as the horizon fills with shrieking shadows.