If you loved High School of the Dead: Drifters of the Dead, try Tokyo Ghoul: Jack
A bridge between a film you've already seen and one most people haven't. Tokyo Ghoul: Jack has roughly 4.9× fewer votes than High School of the Dead: Drifters of the Dead — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theyboth carry the foreign gem mood tag, and they sit in Animation / Horror 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.
foreign gem
What Tokyo Ghoul: Jack is
Rainy Tokyo streets at dusk a lonely bike wheel spinning Delinquent Taishi Fura witnesses a ghoul attack A grim Soichi Shimada anime.

