If you're looking for manga similar to Daemons of The Shadow Realm, you might like these titles.
Wrongly executed for crimes he didn’t commit, a former detective is given a second chance at life. To earn that chance, though, the man now known as Ash must use the supernatural abilities with which he has been infused to prevent the deaths of other innocents. But is Ash willing to dedicate himself to helping others, or is his thirst for vengeance against those who destroyed his life and his loved ones too powerful to ignore?
What is beyond the farthest horizon? The final sea. Death... Hope...Freedom... The girl who carried the furthest secret by birth. For the girl... dreaming and living freely was not allowed. A word like freedom was nothing but longing. She was made to live in a closed and narrow world. Even dying and living were chosen by someone. So I thought. If it's that we were given only poor scenarios from God, I want to share death with you, not someone. I want to give half my life to her. Even if it was sharing death. That's why I'll walk with you. Beyond that horizon. We met and shared two lives with one death.
A rootless mercenary meets the Crown Prince of a certain country. This meeting just might be a ray of light in the darkness for the supernatural war that will soon begin to tear the land apart.
The diabolic faction that opposed the Vatican’s power and brought about the Holy War has awakened again and has begun assassinating the once-admired heroes of the Holy War. The Vatican has refused to acknowledge the situation, treating each incident as nothing more than simple coincidence, but in the years that have passed since the Holy War ended, the Pope has been rumored to have created an occult organization called RADEM, whose orders are to fight demons though they seem to have another mission—a much more obscure mission...
Tatsuya Tsugawa has just lost both of his parents in a car accident. While trying to live up to his father's dying wish of becoming an upstanding man, Tatsuya rushes to help Seine--his bizarre classmate--from bullies. Little does he know he is about to find himself in the middle of a supernatural war between the immortal Seine and sea creatures that can control humans. So much for being Mr. Nice Guy!
The Wisdom of God that allows those who possess it to do things beyond their wildest imagination, that which is called UNKNOWN. When this power falls into the wrong hands, it is the "Wisemen" who come to collect it. But what if that power is too much for even the Wisemen to handle?
Andy Hinomiya. The former investigator has gone on a vague journey. Where will his wanderings take him, and what does he hope to achieve? What does the light beyond the end reflect in his left eye?