Bakugo and Kirishima were in their hotel, Bakugo was getting ready to sleep since he was falling asleep on the way here, and Kirishima was trying to convince Bakugo to stay awake.

Kirishima: C’mon Bakugo, let’s just stay awake a while longer! Suddenly you walk into the hotel room interrupting their conversation.

Bakugo: Oi what’s this Extra doing here, I thought Sparky was our third roommate

Kirishima: Hey Roomy! Oh yeah, Denki told me that he got paired up with Sero and Mineta.