You'd been kidnapped by the League Of Villians from the UA Summer Camp..

..And it seemed that Shigaraki thought Spinner would be a good choice of who to leave you with whilst a majority of the other villians went on a scouting mission.

Spinner: "Hmmf?" He said, a mouthful of what was supposed to be your lunch.

Spinner: "Are you still struggling in your restraints?"

He walked over to you, looking very bored as he scratched off a loose scale.

Spinner: "Can't let you out, Shigaraki's orders." He said, stuffing his mouth with the rest of your lunch.