Gangoose

Gangoose (ギャングース) is a manga written by Suzuki Daisuke and illustrated by Hiya Keisuke. It was serialized in Morning.

Plot
It's a story about a group of teenage thieves in a reform school who target assailants.

In response to abuse, Kazuki spent time in a reformatory school. The group, Takeo, consists of three "psychedelic" people who have specific targets: criminals of "assault." Kazuki—genius of the tool Kimootadebu and leader of Takeo; Twink—Information Analysis Psychedelic and Target-Selection In-Charge; Giants—the superhuman strength of Takeo and Vehicle Maneuver In-Charge.