I remember watching a few episodes of this anime, which was an action anime that featured guns.
In one of the episodes, the two protagonists (a male with black hair, and a blonde female, both teens I believe) were stuck on a hijacked bus along with many other people. The two protagonist had communication with some sort of headquarters. I believe there was a threat to the bus saying that if the bus were to slow down or stop, it would get blown up. Therefore, the bus driver couldn't slow down and had to go faster and faster, and when the bus was approaching a corner, they weren't able to turn. However, the two teens thought of gathering all people onto one side of the bus and using their weight to make the bus lean and turn.
In another episode, I think the two teens were on their way to school, but they got stopped half way at a warehouse as a bunch of robots came out of somewhere and started shooting at them. The teens decided to hide behind crates/boxes. They then pulled out their guns (which they were very good at using) and started shooting at the robots, but it wasn't really effective. There and then, I think it was the male character who did something and shot all the robots right in the robot's muzzle, which made all of the robots exploded, creating a scene for the two teens to escape
In yet another episode (and the last one I can remember), they were on a plane and they found out that one of their friends had been sabotaging them. Some intense talking went down, and that friend of theirs decided to jump out of the plane (safely, because that friend planned the whole thing, so she somehow had a parachute).