K Project characters on a rooftop HD Wallpaper

Four young men are standing and sitting on a rooftop overlooking a city. The man on the far left has red spiky hair and is wearing a white t-shirt and dark pants. The man next to him has black hair, glasses, and is wearing a dark blue uniform with a sword at his hip. The third man has short, light-colored hair and is wearing a dark suit with a red tie. The man on the far right has long black hair and is wearing a dark jacket over a white shirt and tie.