Nobody quite remembered how the idea of an end of year costume party had come up in the final student leadership meeting for that year. Mina and Toru suspected that Kendo brought it up purely so that she and Momo could go in costume together; Ibara suspected Setsuna gave Kendo the idea for her own ends. Whatever the case, the two first year Hero Courses had begun the task of coordinating a massive costume party at Heights Alliance following the UA graduation ceremony. Anyone from the first year courses were welcome to attend, and from the moment the party began its hosts, Kendo and Momo, were amazed at their fellow students' creativity.

Toru was one of the first to arrive, dressed up as the Invisible Woman, Susan Storm. From there, several other students trickled in: Sero, dressed up as Spider Man; Aoyama, dressed up as a knight modeled after his own hero costume; Ojiro, dressed up in an orange gi taken after Ken from Street Fighter; Todoroki, going as Zuko from Avatar: The Last Airbender; and Shinso, who had dressed up as a vampire. Tokoyami showed up shortly thereafter, annoyed that somebody had more or less copied his own dark aesthetic.

Some variety could also be found among the hosts. True to popular rumor, Kendo and Momo had indeed chosen similar costumes. The pair were dressed as Sailor Scouts-specifically, Momo as Sailor Mars and Kendo as Sailor Venus. The other girls of Class 1-B were more than happy to join in alongside Tsuyu and Jirou, with Pony dressed up as Usagi, Reiko as Sailor Pluto, Jirou as Sailor Saturn, Kodai as Sailor Mercury, and Ibara as Sailor Jupiter. With some evident reluctance, Tsuyu had agreed to join in as Sailor Neptune alongside Setsuna's Sailor Uranus. Iida, who had ultimately voted against the idea of a costume party, was worn down by Setsuna until he finally agreed to dress up as Tuxedo Mask, rounding out the group.

Indeed, the couples costumes seemed to be the highlight of the event. Bakugo had expressed his disdain for the very concept of the party every day prior to its arrival, and yet, when the day came, he and Kirishima came in dressed up in each other's costumes. His embarrassment all throughout the party only served to amuse everyone else even further. And, of course, Monoma had decided to come as a vampire himself, accompanying Shinso's own costume nicely. However, there was still one couple that had yet to be accounted for, whose costumes were the subject of intensive speculation.

"Pffft. Come on, we all know it's gonna be something about All Might," Sato remarked.

"You sure? I don't know how well he'd fit into a costume like that," Todoroki stated.

"Plus, what would Mina go as in that case? They wouldn't not do matching costumes," Ochaco added.

"Maybe she's going as Mount Lady or Midnight," Mineta remarked, with a certain look in his eyes which the class recognized all too well. Kaminari promptly zapped him, causing him to cry out in pain and quickly discouraging him from further remarks.

"They could always go as some other superhero pair," Kaminari remarked. "Like Batman and Catwoman."

"Maybe..." Ochaco thought aloud. No sooner had she done so than the very couple in question burst into the common area from the direction of the elevator, Mina sliding in on a harmless pool of acid while Izuku tried in vain to reel her in by speeding up with Full Cowling, in costumes few had expected. Similarly to Kirishima and Bakugo, Mina had elected to dress herself up in a modified version of Izuku's costume, while Izuku was dressed in a suit modeled after Mina's costume, complete with its unique coloration and the fur collar.

"Aw, damn it," Mineta muttered, hoping nobody overheard him. "I was really hoping for a Catwoman costume." Kaminari promptly shocked him again, with greater intensity.

"Never fear, partygoers! For WE ARE HERE!" Mina proclaimed joyously, doing her best All Might impression, while Izuku chuckled nervously. The class chuckled at Mina's dramatic entrance.

"Aw, hey, you did the same thing!" Kirishima said, chuckling as he approached the couple with Bakugo in tow.

"Haha, yeah! It was an...interesting process," Mina replied, glancing off at Izuku as he looked back in understanding. This was far from the first idea either had proposed.

"That suit looks fucking ridiculous," Bakugo stated in his usual blunt fashion.

"More ridiculous than the flower suit you wore to that party?" Mina shot back, to Bakugo's chagrin.

"Hey! I looked fucking amazing in that shit and you know it!"

Kirishima laughed. "It was kinda silly looking, in hindsight," he conceded. "But, then again...you can pull off just about anything," he finished with a smirk.

Bakugo found himself blushing slightly in embarrassment. "S-stop being so fucking sappy, Eiji!" he muttered in retaliation, which only caused everyone else to laugh.

"Seriously, though, you both look great," Kirishima said to the two of them.

"Likewise," Izuku replied, shaking off some of his earlier embarrassment.

As the couples continued chatting, the party went on without interruption, and much enjoyment was had by the soon-to-be second year students of the UA Hero Course.

Izuku and Mina walked down the hallway on the fourth floor before Mina opened the door to her room, exhausted. Izuku, purely out of force of habit, kept himself outside of the room for a second before walking in as well.

"Still can't believe we lost Best Couples Costume," Mina said as she slipped off her boots.

Izuku shrugged. "Well, to be honest, if the class leadership team hadn't bowed out of the running, none of us would've had a shot."

"Still, to lose to Bakugo?"

Izuku chuckled. "It was probably me and the suit."

"Uh, you look fucking amazing in that suit, what you mean?" Mina asked frankly, to Izuku's amusement. She then put a finger to her chin in thought. "Of course, you out of that suit is almost as good..." At this, Izuku became considerably more embarrassed, which Mina simply chuckled at. "Relax, Izu! I'm not pressuring you into...that," she said reassuringly, with some slight hesitation due to her own embarrassment. "But, maybe you could at least...keep me company? For the occasion?" She smiled at Izuku as she laid herself out onto the bed, patting the slight space to the left of her with her hand.

Izuku smiled. "All right, Mina," He said before taking off his own shoes and settling down into the space next to her, whereupon she promptly let her arms drape over him with a yawn. Izuku chuckled and closed his eyes, allowing Mina's gentle breathing and the sounds of life outside to guide him to sleep.

And Day Three is done! The prompt here was "Couple's Costume," if I recall correctly, so I turned it into a costume party. Hope you all enjoy, and stay tuned for more the rest of this week!