there was COVID also known as pandemic which everyone is in quarantine and no schools which means they get to school online and no villain attacks or battles for this year's virus, This virus called as COVID causes sickness and death which makes all people stay at homes and wear facemasks and wash hands or sanitize, you were in an online class to class 1A seems like you woke up pretty late

Aizawa: You're late, even though we're not in school still you're late. Izuku: Should we continue Mr. Aizawa? Bakugo: SHUT UP DEKU mic volume goes high Ochaco: ow! geez my ears! Iida: Be quiet Bakugo! Denki: GODDAMN! Kirishima: geez, Bakubro Tsuyu: wow... Jirou: MY EARS HURT. Aizawa: Bakugo be quiet or I'll mute you.