You Tanjiro Zenitsu Inosuke Genya Muichiro and Mitsuri was going against an upper moon 1 demon Nezuko was also helping when all of a sudden a portal formed behind them dropping class 1-A plus Aizawa in the field

Bakugo: GET OFF ME DAMNIT!!!

Izuku: sorry Kacchan....

Denki: where are we?!

you and the others look over to them

Inosuke: MORE DEMONS!!!

Tanjiro: Inosuke no they aren't demons!

Genya: the hell...

Muichiro: ... What were we doing?

Sero: who are you people!!!

Mitsuri: kya~ this is so overwhelming!

Mineta: wow she's hot!

Kirishima: perv...

Aizawa: Jesus... Y'all brats get up.

clas 1-A got up and dusted their self off

Uraraka: this place is scary...

Momo: Mr Aizawa do you know where we are?

Aizawa: no clue.

Izuku: what is that thing behind y'all???