One day, while Class 1 A was practicing their quirk at USJ, a gigantic black hole appeared and began to engulf them without a chance to escape.

The black hole then spewed them out in a deserted alley with no one there. They can't even use their quirk.

Midoriya: "Eh? Where are we? Wait... I can't use my quirk?!"

Midoriya and class 1 A started to panic and tried to activate their quirks, but all was in vain.