Getting in behind is a tactic in football where the striker times a run behind the defense line to receive the ball with a lot of space beating the offside. Basically running at the defense before the pass is played, but the run has to be timed perfectly for it to be effective and not to get flagged for offside. its a powerful weapon for strikers.
LMAO some added context for Nagi and Barou- in a spin off manga abt the first bit of story from Nagi's perspective we get to see when Nagis team (V) fight Barou team (X) and Team V wins ofc but the whole time Barou is calling Nagi a lowly servant who just folllows Reos orders and also kinda pushes Reo over at some point and Nagi is Pissed. Its one of the first times he gets fired up in soccer cuz he just wants to beat Barou's ass. So yeah they so have some left over beef from that Nagi's not necessarily just picking fights for fun fdshsfdhj
