Katayama Shuu manga
A world with Troubles and Traces. It's kind of like a sequel to Trace and Trace 1.5, but it's by a different author/artist and has different characters, although it's the same world.
From Shiro Nabi In this era, humans and androids live together in a time of advanced technology; but when things go wrong who is there to solve it? The Automata's of course, the special people who can dwell between the thin border of the human and cyber world. But maybe there is more to an Automata than people thinks?