Zodiac P.i.
Not the best I have ever read but it good if you have some extra time on your hands.
Honey Bitter
I really enjoyed reading this! I do have to say that the female main character kind of went to far for me with the whole "I hate men" thing but its still worth the read. Five Stars! HIGHLY RECOMMENDED
Majin Tantei Nougami Neuro
I have yet to finish reading this, but so far it is amazing! I have never read anything like this and look forward to reading the rest. HIGHLY RECOMMENDED
Kanshikan Tsunemori Akane
Very good series. I recommend this to anyone into psychological, action, and/or detective mangas. HIGHLY RECOMMENDED!
Keishichou Tokuhanka 007