If you loved Ajin: Demi-Human, try Brave: Gunjyou Senki
A bridge between a film you've already seen and one most people haven't. Brave: Gunjyou Senki has roughly 10.1× fewer votes than Ajin: Demi-Human — 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
Both films are directed by Katsuyuki Motohiro, and they both carry the raw mood tag, and they sit in Action / Mystery territory. If that's the register that drew you to Ajin: Demi-Human, the second film will land in a comparable space — through a different lens.
What Brave: Gunjyou Senki is
Honnoji Academy. Clattering arrows. A loner sharpens his game while a friend pleads with him to lighten up. Then lightning, anachronisms: a campus overrun with katana-wielding samurai. They've been flung into the past, right into the meat grinder of the Sengoku era. It's *Azumi* meets your old high school, if that sounds like a thing you'd watch.

