If you're looking for manga similar to Hito Kui, you might like these titles.
The prisoner Akeboshi Kurou who was being transferred to a prison in Tokyo is involved in a plane hijacking, in the process he tries to save a girl who was taken as a hostage. But the plane is attacked by a herd of crows and a monster raven that make the plane crash.
Do you know the dark dictionary? No one knows when this book has been in the world. However, it is a terrifying book that has long been devastated by human fear. At some point, it will be quietly placed in a secondhand bookstore, in a library, or in a midnight convenience store. And invite what you get into the world of terror.
Any high schooler on a nerve-wracking first day at a new school is apt to lose his or her head a little, but in Noh-A’s case, she literally does! When she wakes up in one piece with a little help from a mysterious doctor, Noh-A quickly realizes that nothing is as it seems at Amityville High, where paranormal creatures battle for supremacy. Caught in the crossfire, Noh-A may have to rely on the unlikely (and possibly unreliable) aid of the most sinister student at Amityville…the deadly Jack Frost!