Mr. Aizawa got tired of the class staying in their dorm rooms, so he took everyone on a road trip to the beach

Katsuki: "WHY THE HELL DO I HAVE TO GO!?"

Mina: "Oh come on, Bakugou! It'll be fun!"

Izuku: "Yeah! You can't complain about a free beach trip!"

Everyone else is either checking their bags for anything they could have forgotten, or are just chilling while waiting for Aizawa to finish the drive to the beach