Triage X is Satou Shouji's, also Highschool of the Dead's mangaka, new series. The art is very alike, and... so is the ecchi. Triage X is about a group of "secret agents" of some kind, who are given missions to assassinate certain people. Triage, in medical terms, is the prioritizing of medical patients, according to their condition. The series works pretty much the same way, except with these guys the prioritizing is by corrupcy and the treatment is death.
I'm pretty much enjoying the series, even though there's only 3 chapters so far. If you like(d) Highschool of the Dead, give this series a try and pick it up as a replacement, since I doubt HotD will be coming back, anytime soon.
Chapters for Triage X can be found on MangaShare.