How does Yujis protection ability work?

Yujis was untouched by the axe attack in the newest chapter?

It kinda reminds of infinity, but Yuji obviously does not have that and he should not be able to do the arithmetics without six eyes.

But he grabs the the axe when he readies himself for Blackflash. So its probably an ability that he turns on and off.

My first instinct was it being Domain amplification with maybe some CT combination that he figured out. But that would not make sense. For black flash you probably do not need DA to be turned off.

UNLESS yuji can only do that with DA because of the precise impact of the hit.

So… I am not sure. Maybe its a form of constant dismantles that his body shoots out. Sparks do fly of the hand. But like previously. He should not be able to do the precise math.

So maybe gravity ability inheriting from his mom?