What the Fuck Is UA

Izuku looked at the case confused for a moment. He grabbed the box and brought it to the living room. He just looked at it for a few moments, before opening the box.
...
Izuku sat there staring at the disk for a few minutes after it had ended his thoughts going wild, but the main thought in his head was, 'What the fuck is UA.'

{#1 in Hisashi 5/30/20}