Create an unsolvable choice for the defender. Time the overlapping and underlapping runs together, hold the ball long enough to make the defender commit, then release into whichever lane he leaves open.
On one side with a goal and keeper, the winger receives with a defender in front. A fullback overlaps outside and a midfielder underlaps inside at the same time. The winger holds the ball until the defender commits, then releases into the free lane; that runner attacks the box and finishes. Run it to both sides and swap the roles so everyone makes both runs.
Two runs at once removes a defender's ability to be right. Sent one at a time, an overlap or an underlap is a question he can answer by reading it correctly. Sent together, outside and inside, they present a choice with no correct answer, and a defender who cannot be right is no longer defending so much as guessing.
Which changes the ball carrier's job from beating a man to reading one. He is not trying to go past anybody. He is holding the ball long enough to force a decision, watching for the moment the defender's hips turn, and then releasing into the lane the hips have turned away from. Hips rather than eyes, because a good defender will look one way and move the other.
Holding long enough is where this collapses in practice. Releasing early means the defender has not committed, both runners are covered and the double movement has been spent for nothing. It has to feel uncomfortable, which is why it needs rehearsing before anyone tries it in a match.
The two runners have to genuinely commit, and this is the part that quietly fails. A player making a token run, knowing the ball is probably going to the other one, gives the defender an easy read. Both runs are real or neither works.
The cost is significant and worth stating. Two players committed forward past the ball leaves the flank empty behind them, so a turnover here is a counter-attack into space your full-back has vacated. This is an advanced pattern for a reason, and it should not be the default.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.