If you loved Calamity of a Zombie Girl, try Ao Oni The Animation
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.
What they share
Theyboth carry the 3am cult mood tag, and they sit in Animation / Horror territory. If that's the register that drew you to Calamity of a Zombie Girl, the second film will land in a comparable space — through a different lens.
3am cult
What Ao Oni The Animation is
Old school hallways on a rainy night a creaking door. Five club members uncover folk tales of the Bellflower Oni. The director's touch echoes 90s anime horror.

