If you're looking for manga similar to Abe-kun no Nanakakan Sensen, you might like these titles.
Mia is part of an police special task force involved with several big time international cases and big time operations. Despite her uncouth, rash, and irresponsible behavior, Mia's skills are great enough to be the best of her force. With a great team, pseudo-romantic interests and upbeat life style, Mia's thrill-seeking life could not be better.... But then she died tracking a highly wanted criminal... But this story just can't end like that now, can it?
Invaders from an unknown dimension prey on the loneliness of the human soul. The only thing between them and the success of their diabolical plan is 4 youngsters with powers to rival the invaders!
For thousands of years, demons have lived in human society. Hundreds of years ago, Japan created a secret society of swordsmen who will battle these demons. Our main characters battle demons and save countless lives as well as learn a little bit about each other.