After a long day of work, all Sero wanted to do was go home and relax at the apartment. Today was his birthday, but honestly, he wasn't expecting much. Yumi had taken him to the Golden Noodle the night before, and everyone was having to work so he didn't think they'd want to do anything. A quiet night at home with his girl and takeout sounded great to him.

Washing out the blenders, he found it funny how different this year's birthday would be compared to last year. For his 21st, they'd been at Keigo and Dabi's apartment; the two insisted everyone hang out there to get drunk since most of them had been underage at the time.

He remembered getting completely hammered, seeing as he'd drank more at his birthday than he did at Bakugo's. Sero liked to think he gained control of his alcohol intake during the year. Still, he remembered most of the night, and how much fun everyone had.

The more he thought about that night, Sero started remembering a conversation he'd had with Kirishima towards the end. They'd been one of the last few people still at the party as Dabi, Keigo and Shinso were having to be designated drivers for basically everyone. They were on the couch, still drinking, with Yumi sound asleep next to him.

Kirishima seemed anxious about something. He cleared his throat. "Hey, man, so….we're really good bros, right?" he asked, looking over at Sero.

Sero looked at him, eyebrows raised. "Yeah, I'd like to think we are."

"Like...you know we've known each other for a long time."

"Yeah….?"

"Have you like...talked about that kind of thing with Yumi?"

Sero felt the arm around his girlfriend tighten. "What kind of thing?"

"Like...you know..um...trying...stuff...with other people."

Maybe he'd consume too many beers, because Sero wasn't understanding what Kirishima was saying. "I don't follow."

Kirishima sighed, rubbing the back of his head. "Well like...you know how at Build-a-Bear you put the stuffing into one bear at a time?"

"Yeah…?"

Kirishima cleared his throat again, his cheeks turning as red as his hair. "Well, like...what if...it's like that, but...more than one bear at once?

Sero sat there, thinking about the analogy. Bears being stuffed...what did that mean? Thinking about it for a bit the answer finally clicked. He pursed his lips together, contemplating what to say next. "Like, how many bears are you suggesting?"

"Um...I guess two or three.."

Sero looked down at his sleeping girlfriend then back at Kirishima. He could never see himself sharing her in a way like that. "Um...man, you're one of my best friends, but I don't-"

" - No, yeah, no worries! It was just a question," Kirishima said, nervously laughing. Sero wasn't entirely convinced it was a question.

"So, like….what do you mean? You want….do you want to be the one stuffing bears...or do you want someone else to stuff your bear?"

Kirishima thought about it for a bit. "I mean...I'd be down for either."

Sero just nodded his head and drank his beer.

Honestly, it had been a weird conversation. He and Yumi hadn't even been together for a year at that point. With a quiet night at home, maybe he would be able to avoid anything awkward like that happening again.

~.~

Kaminari excitedly hurried down the hall to Sero's apartment. He carried several 12 packs of Sero's favorite beer.

"Careful dude. We don't need you dropping those," Kirishima called from behind. He carried a few bags with food inside. All of Sero's favorites.

Kaminari stopped in his tracks, turning to look at his friend. "He gets off work soon. We gotta make it quick!"

It was Sero's birthday and the two came up with the idea of throwing him a surprise party. It was just them. Everyone else was working and wouldn't be able to join until after work. So they would be partying early with the birthday boy once he got home. Kaminari was excited because this was going to be one of the last things he did with everyone before university classes started in August.

As far as either knew, Sero didn't have any plans for the day so it seemed like a perfect idea. Of course, it was important to note that neither of them had discussed anything with Yumi.

Coming up to the apartment, Kaminari noticed their first setback. "Do you have the keys?" he asked, looking at Kirishima as he walked to the door.

Setting the bags down, Kirishima checked his pockets. A while back Sero had given him a key to the apartment as an emergency, but he couldn't remember if he had given it back. "I don't know," he said as he continued to check his pockets.

Kaminari, on a whim, gave the knob a turn. He didn't expect the door to actually open. The two looked at each other. Did Sero forget to lock the door? Talk about luck. Wasting no time, the two hurried into the apartment and shut the door behind them.

The apartment was small, but homey. It was very much decorated in Sero's style of traditional Japan, with the exception of a few unpacked boxes in the corner. The kitchen was separated by a wall. The main room doubled as a living room and a dining room with a sectional and tv in the middle of the room and a small dining table in the corner. There was a small hall with closet space for extra storage. At the end of the hall was a door that led to the bedroom. There was a master bathroom in the bedroom.

"Let's make this quick. He should be getting off work soon," Kaminari said as he set the alcohol on the table. Kirishima set the bags down beside that.

He rummaged through the bags, making sure it was all there. "Let's see we got: food, alcohol, decorations, music. Are we forgetting anything?"

Kaminari thought about it. "Girls!"

Bringing his fingers up to his nose and pinching the bridge, Kirishima let out a sigh. "He's got a girlfriend, genius." Come to think of it, where was Yumi? He had heard she'd taken the day offfrom Hooters, but she wasn't around. Weird.

The boys got to work decorating the apartment. In no time they got the place ready for a party. The food was spread out, the cake was in the fridge, drinks were in the cooler and they managed to do a decent job decorating despite being in a rush. Streamers and balloons littered the place.

Kirishima looked at the clock on the wall. Sero would be home any moment. "Let's go hide in the bedroom," he said, dragging Kaminari along. The bedroom door had been shut the entire time. When they opened it, both were surprised to see Yumi sitting on a bed of rose petals. A single candle burning gave any light to the room.

The light from the hall cast onto her form and the two would clearly see she was wearing a distressed Hooters uniform. The lace of her bra peeking from under the shirt. Her hands were tied together in the front of her body by a pink bunny stuffed animal. Her cheeks were bright red.

Clearly she hadn't been expecting the two of them.

The room was silent for a moment. No one knew what to say. Kaminari covered his eyes. He was just as embarrassed as Yumi was.

Kirishima swallowed. "Damn, you look really good," He said, looking her over for a moment.

Yumi stared at him, confused and embarrassed. "W-what?"

He snapped out of his fantasy when he realized what he had said. "I mean..what the hell Yumi?"

"Why are you getting mad at me? What the fuck are you guys doing here?!" Yumi asked, her embarrassment gone. Just annoyance remained.

"Us? What are you doing here?" Kaminari asked, unsure of what to think of the situation. Sero was going to be so pissed if he found out about this. He was mentally preparing for his death.

Yumi just stared at them. She pondered for a moment how Kaminari had gotten into university or how Kirishima was able to run Build-a-Bear with brains like theirs. "I LIVE here you idiots! Remember?! What are you doing here!?"

It clicked. The door hadn't been left unlocked by Sero. Yumi had left it unlocked for Sero.

Before either of the guys could get a word out the front door opened. All three turned their heads to see Hanta Sero walk into the apartment. Tossing his keys on the table, it took him a moment to notice the apartment was decorated. "Hey Yumi, did you decorate?" he asked, looking at the spread on the table. Everything looked good. "Wow, you put a lot of thought into this. Are people coming over?" he asked, turning to look at the bedroom, only to see Kaminari and Kirishima standing there. "Denki? Eijiro? What are you guys doing here?"

The two boys huddled by the door, blocking his line of sight into the bedroom. This looked bad.

Sero took notice of how they were acting. "Guys, what's going on?" When neither said anything, Sero made his way over to the door. Pushing the two aside he saw Yumi sitting on the bed. He saw what she was wearing. Fuck she looks good.

"H-Happy birthday Hanta," Yumi managed to say. She was both embarrassed and disappointed that her plan had been ruined. Sero had been wanting to have sex with her in uniform so he could 'do it with a Hooter girl' for a while now, but she had always told him no so he didn't ruin her uniform. So she'd bought a new one and made alterations to it specifically just for this moment. He would be able to do whatever he wanted without worrying about ruining her work clothes. Too bad dumb and dumber ruined it.

Sero looked at Yumi, then at Denki and Kaminari, back at Yumi before looking at the boys again. "Did you guys do this?" His mind went back to the conversation he'd had with Kirishima over a year ago at his 21st birthday when he'd told him about his desire for a threesome or foursome. Had the two put Yumi up to this? There was no way Yumi would do something like this on her own. He was the one that initiated things like this, never her. Hell, he'd bought her the bunny plushie tied around her wrists for Christmas to motivate her into trying new things. No, there was no way Yumi did this. The two must have put her up to it.

"I know you didn't plan to use my birthday to have a foursome with my girlfriend," he said darkly, looking primarily at Kirishima.

Judging on the look in his eyes, the two knew they were screwed. If there was one thing the two knew, Hanta Sero was protective of his girlfriend. He didn't make it known to the world, but they both certainly knew it. Yumi looked back and forth between the guys, confused. What was this about a foursome?

"No dude, believe us. She was like that when we got here," Kirishima tried explaining. Kaminari made a swift run to the door.

"Now why don't I believe that?" Sero asked, taking a step closer.

Kirishima, knowing that talking rationally was out the window, bolted for the door. The two ran out with Sero making a mad dash behind them. Yumi was left alone in the apartment. Seeing as the surprise was ruined, she worked on unknotting the bunny's ears from around her wrist. It didn't take very long and soon she was off the bed. Going over to the closest she grabbed one of Hanta's hoodies. Pulling it over her head, it was long enough to cover up the Hooters uniform. Blowing out the candle she walked out to the living room. The two had definitely decorated for a party. How hadn't she noticed? Giving the apartment a look over she grabbed a beer from the cooler and plopped herself on the couch to watch tv.

Eventually Hanta was bound to return, and it seemed now they could expect guests over. Yumi leaned her head back. Not how she'd hope her plan would go.

"Stupid boys," she muttered to herself, drinking the beer.

~.~

As expected, within the hour all the crew had managed to squeeze into the small apartment.

Currently Keigo was trying to take a peek inside the bedroom, while Yumi was blocking the door. "I just wanna see the bedroom. I've always been curious how - "

" - Don't even finish that sentence," she warned him, pushing him away by his chest. The height difference between the two gave her a disadvantage. She'd barely budged him away.

"Come on, I just want to know details. You two are the only ones that can keep up with the amount of sex Dabi and I have."

"Why does everyone keep on insisting that my sex life is gossip?" she asked, getting fed up.

Dabi walked over and draped an arm around Keigo's neck. "Leave the girl alone. She's agitated enough," he said, laying his head on Keigo's shoulder. His sharp blue eyes examined her for a moment. "You two haven't fucked today, have you?"

Yumi's cheeks turned red at how bluntly he said it. Her eyes darted away from the two.

Keigo smirked at her reaction. "Doesn't look like she did. Shame, I'm sure he's looking forward to having some birthday sex. Not sure why you chose to throw him a party."

Yumi's hands clenched into fists. "I didn't. It was Kirishima and Kaminari's idea."

"And you let them? That's nice of you. Putting their want for a party of your needs to fuck your man."

Biting her lip, Yumi looked down. The two hadn't even talked to her about having the party. She understood they were his friends, but she was his girlfriend. Why did it always feel like she was competing with the two? Didn't she get first to say to things like this? Couldn't they have at least run it by her?

Keigo and Dabi looked at each other. Maybe they'd gone too far in their teasing. "You didn't know, did ya?" Keigo asked as Dabi stood up straight.

"Enjoy the party," she muttered, needing some air. Pushing past the two she managed to make it out the front door without too many people noticing. Sero seemed too busy with Kaminari and Kirishima to notice anyways.