While class 1-A and 1-B were out on the training grounds preparing for some training, a portal opens up. Students backed away as hashira and the kamaboko squad spilled out

Zenitsu: “AHHH!! This is the death of me!” Inosuke: “HUH?!” Tanjiro: “Woah..” Nezuko: “Mm, hmmph!” — Mitsuri: “Eh?!” Shinobu: “Oh my!-” Tengen: “Where are we?” Muichiro: “…” Looking around Giyuu: “..” Sanemi: “What is this bullshit..?!” Obanai: “What the hell..”