Hado of the big three and a rehabilitated Himiko join Class 1A on the beach, split between teams in a water gun battle. Those teams are

Team Explosion Murder Members: Bakugou, Kirishima, Kaminari, Sero, Ashido, Hagakure, Jiro, Ojiro, Koda, Sato, and Shoji.

Team Deku: Midoriya, Uraraka, Iida, Todoroki, Asui, Yaoyorozu, Tokoyami, Mineta, Himiko, Hado, Aoyama, and Guest

A peaceful day at the shore transforms into a chaotic battlefield! Under an umbrella, Aizawa lounges lazily, tuned out. Near the dunes, Sato and Shoji guard Team Explosion's water tanks, while Koda commands seagulls to scout from above. Down the beach, Ojiro sweeps away water balloons with his tail, while Aoyama poses alongside Hagakure—the two making an incredibly bright duo as his laser reflects off her invisible body.

Suddenly, a pressurized wall of water erupts across the sand!

@Bakugo: Grinning maniacally, a twin-barrel water cannon strapped to his shoulders. Move it, extras! Team Explosion Murder is taking you down! Die, Deku!!

@Kirishima: Hardening his arms to block an incoming spray. Yeah! Let's go! A real man fights with maximum soaking power! Keep pushing!

@Midoriya: Ducking behind a sand wall, checking his pistol. Kacchan's team is aggressive, but we have a tactical advantage! Focus fire on their flanks!

@Todoroki: Idly using his right side to freeze ocean water into instant ice barriers. Shielding our rear. Advance when ready.

@Kaminari: Laughing as he shoots wildly. Eat plastic, losers! Zzzzt! Wait, if I get wet, do I short-circuit myself?!

@Mineta: Sprinting forward with a super-soaker, eyes locked on the girls. I'll drench them all! Especially Momo-chan in that—Zwap! Jiro’s earphone jack whips forward, plugging into his goggles and flipping them over his mouth, completely silencing him.

@Jiro: Smirking as she retracts her jack, plugging it into her water rifle. Problem solved. One more creepy word and I'm blasting you into the ocean.

@Sero: Laughing from a palm tree. Nice shot, Jiro! Keep him locked down!

@Ashido: Skating across the wet sand, dodging splashes. Woohoo! Try and catch me!

@Hagakure: Her floating swimsuit bouncing energetically. I might be invisible, but our defense is flawless! You guys won't even see us coming!

@Tokoyami: Dark Shadow holding two water pistols, hovering in the shade. Behold, the deluge of darkness!

@Asui: Leaping high into the air, firing dual pistols. Direct hit, kero! Watch out for their counter-attack!

@Uraraka: Using her Quirk to make heavy water balloons weightless, floating them high. Guest! Momo! Now! Release the gravity payload!

@Hado: Floating in the air, swirling water streams around her hands. Wow! Look at all the colorful water! Boom, boom! Are you having fun, Guest?

@Himiko: Giggling as she sprints past the ice barriers with agile, wild flips. Haha! This is so much fun! No blood today, just cold water! Guest, save some targets for me!

@Yaoyorozu: Cheeks blushing as she hands Guest a synthesized water core. Guest! I've reinforced our pressure tanks. Let's win this together!

@Iida: Chopping his arms wildly, soaked from head to toe. Team Deku, maintain formation! Guest, lead the charge!