If you're looking for manga similar to Devils and Realist, you might like these titles.
Yuuto Amakawa has had a tough life. Seven years ago, both of his parents were tragically killed in a car accident, leaving him without a single living relative. His friend Rinko Kuzaki has taken care of him every since. Yuuto's sixteenth birthday has arrived, but instead of a birthday gift of a normal life he meets Himari, a catgirl samurai who swears to protect him. Within weeks Yuuto's life is thrown into chaos as his family's dark past comes to light. With demons appearing around him, Rinko and Himari fighting for his attention and a sinister plot beginning to surface, can Yuuto live the normal, safe life he wants so badly?
Andrea Marcos is a young man looking for someone to translate a mysterious letter left to him by his late mother. His search leads him to viscount Theodore, a young, prodigious but hot-tempered and grouchy young man, fluent in 8 languages and a popular author of illusionary stories. To make things more interesting, not only does the viscount not believe in anything paranormal but the letter was apparently delivered to Andrea by fairies...?!
Chifuyu Amamiya, a high school girl who is lonely for a lifetime. I am haunted by a handsome (self-proclaimed) Shinigami, and I'm in trouble because he's stalking. In addition, a group of “God-like Poems” such as “Victory Goddess Possession” and “Inari-sama Possession” and teachers of “Rice God Possession” will appear more and more.