The blonde's hand sunk slightly into Midoriya's gooey one as the two young teens' hands clasped together, the former made of flesh and skin and bone, and the latter made of cool yet soft green slime.

If Midoriya was being honest to himself, he would say that he was a little bit scared at the moment. It just felt too good to be true, like at any second his new host would just say 'Surprise!' and call it all off. Being accepted by someone? Being wanted by someone? The two things he's always wanted were now being presented to him on a silver platter, yet he couldn't help but wonder when (not if) the partnership would end, when Bakugo would get tired of him and strip him of all this newfound hope; the one thing he's been doing his damndest to snuff out.

The slime blinked out of his rumination as he retracted his hand. "Soooo...um, what now?"

Before Bakugo could respond with a witty comment, they heard the doorknob rotate left and right, its noise like a siren in the near-quiet bathroom. Turning in horrified shock, the two watched as three loud knocks reverberated against the white oak door. "—Oi, brat! What the fuck's taking you so long?!" a loud, feminine voice shouted.

"Fuck..." Bakugo groaned out in a whisper, clicking his tongue in annoyance. He quickly looked around his bathroom for a hiding spot for his friend acquaintance, but after finding nothing short of hiding in the toilet water, Katsuki turned to face the slimebiote. "We'll talk later. Get on, stay hidden, and remember our deal," he quietly ordered, holding out his right hand to the slime.

Wordlessly and with little hesitation, Midoriya immediately latched onto the hand. His gelatinous body exploded into a tsunami of slime that enveloped the fleshy appendage, wrapping around Bakugo's skin as it traveled all the way up to his torso before finally oozing his way in through his host's pores. As the feeling of hunger ebbed away from his mind, Midoriya decided to reacquaint himself with Bakugo's everything.

Spreading himself out evenly, as to make sure his host's center of balance was similar, he connected himself to every organ, bone, cell, and nerve within his host. Izuku now had ultimate control and the final say on any bodily process, and (while staying hidden) he decided to slowly turn Bakugo's body into a more muscular one, hoping that this is what Kacchan Bakugo meant when he said to keep him at his best.

To say that Bakugo was surprised how fast his new friend acquaintance worked would be an understatement; it was almost as if Slimefuck was eager to attach to him, but that wasn't important at the moment. Meer seconds after the slimebiote disappeared, Bakugo Katsuki realized that he felt damn near...unstoppable.

It wasn't like before when he got home, his whole body felt energized and blessed with pure power, like he just took an experimental steroid with no side effects. Bakugo felt like he could run a mile without a sweat, that he could bench press a ton, that he could—

Katsuki shook his head, trying to ignore all these new sensations bombarding his mind. With a huff he stomped over and threw open the door to glower at mom for nearly ruining everything (like always). "The fuck are you bothering me for, you old hag?!" Bakugo spat out, a vein popping out on his forehead.

As soon as the words left his mouth he felt a hard whack to his head, which made him wince in anger. "Oi! I told you to stop calling me that!" his mom reminded, giving a disapproving stare to her son. "I thought you fell asleep in the bathroom, for fuck's sake. I come to check on you and this is the fucking thanks I get?!"

"I don't need you to check up on me! I'm not fucking eight anymore, hag!"

Mitsuki massaged her temples as she took in a deep breath of air to calm herself down, knowing it was wrong to send her one and only son to the goddamn thermosphere. "Ugh! Whatever, brat. We're about to eat so sit your ass at the table already," she barked out, walking down the steps as if she weighed a ton.

Once she was out of earshot, Bakugo began to grind his teeth together, hating that his old hag smacked him again. It was like the fifth time this week that she did this to him, and she knew he didn't like it but did it anyway; probably for some bullshit reason like 'lack of respect' or some other crap. Already he was rubbing the spot out of reflex, wanting to gauge if he should get an icepack or two. But as he descended the staircase he realized that there was no pain. At first he felt surprise, but by the time he got to the final step, his lips had morphed into a small smirk.

Bakugo Katsuki was laying down on his bed face up, his arms crossed behind his head as he contemplated what had just happened not even fifteen minutes ago. Dinner was...a warning, to say the least. Hiding Slimefuck, or 'Midoriya' (as the slime insists to be called), was laughably easy. The parasite never acted up, never revealed himself, or did anything to piss him off. So all in all the slime was already leagues ahead than all the extras at school who sucked up to him.

No, the problem wasn't Slimefuck but with...himself. It took a mere ten minutes for his mother and father to finish up their first bowl of katsudon. In that same amount of time Bakugo had already finished the rest of the meal. Not just his own bowl of food but the entirety of the dinner his mom had painstakingly made after a long day at work. There was supposed to enough food for everyone to have two servings, with enough leftovers to bring to work/school; but there wasn't a single crumb left in the blonde's wake, as he had practically licked clean the entire bowl (several times) in a seemingly desperate attempt to get even one more tiny morsel. Even with all that food in his gut, Bakugo wasn't bloated and still felt as if he was only half-full.

"C-can we talk?" asked a quiet demure voice, which came (oddly enough) from the blonde's left forearm.

"Could I stop you?" Bakugo snarkily asked back, waiting for his companion to say what was on his mind. After a full thirty seconds of awkward silence passed, Bakugo sighed as he sat up on his bed, bringing his left arm in front of his face as if he was checking the time on his watch. "Oi, show your face, Slimefuck." Immediately after, in less than a second, the blonde watched in awe/unease as he saw his left arm bubble over into green ooze, which eventually became his partner's head from the neck up. Izuku's face, besides his cheeks being a slightly darker shade of green for some odd reason, looked healthy but he was also pouting.

"That's not my name!" Midoriya cried out, acting as if he would begin to cry.

Bakugo rolled his eyes, suppressing the tiny smile that wanted to ruin everything. "Yeah yeah, cry me a fucking river. You wanted to tell me something?"

"Uh yeah, I did! I just wanted to ask if there were more ground rules I need to follow."

The blonde frowned a bit at his acquaintance's wording. It rubbed him the wrong way, and it was pissing him off to feel something he couldn't identify. "Do you have a shit memory or something? This is a fucking partnership, not a dictatorship. I'd have rules too if you weren't too chickenshit to tell me and if my old hag didn't interrupt us."

A reply didn't come immediately, for the slimebiote had pressed his gooey lips into a narrow line, disappointed of what Bakugo had said. He wanted to say that he should treasure his mom more, that one day you won't have anyone to take care of you, that you'll yearn for the love she so freely gave to you. Instead he lamely replied, "Your mom is a nice lady, so I don't really get your nickname for her."

"Oh trust me, Slimefuck. Your tune will change once you stay longer than a day," the blonde warned, seriousness mostly in his voice.

"Why do you treat your mom like that?" Midoriya eventually asked with a sigh, trying to squash the jealousy that wanted to annoy him, but he couldn't stop himself from subconsciously making his host's skin develop goosebumps.

Bakugo did a half chuckle as he pulled out his phone from his right pocket, opening up his notes app. He began to type with his one usable hand as he explained in a flippant manner: "Why? Because she's a pain in my ass, that's why. She's always telling me what to do, like stop calling the extras at school extras, be respectful, and to start making some friends," he stopped typing for a couple of seconds, his eyes becoming distant as he got stuck in a long forgotten memory. He shook his head before diving back headfirst into his explanation, "'course all the extras at my shitty ass school had to be shitty ass suck-ups, or whatever-the-fuck. None of 'em were even cool enough to be in the same room as me, much less be my fucking 'friend'," he air quoted.

Now done with his little story, Bakugo finally finished typing on his phone and shoved it into Midoriya's face with a smug smile on his face, showing his partner what he was doing for the first time in the last five minutes:

Me and Slimefuck's Commandments for our Deal! 1. 2. 3. 4.

Midoriya Izuku looked at the screen and back at his friend's eyes in quick succession, as he was seriously hoping that the latter was joking with the title. There were several mistakes in the title alone...actually, if Midoriya was being honest at the moment, the actual problem was the everything.

Confident that Izuku liked it Bakugo said, "What should the first one be?" After getting no reply for a couple seconds, he opened his eyes to see the not too pleased look of his partner. "You got a problem with it, Slimefuck?!" Bakugo barked out, "You think you could do this better than fucking me?!"

Midoriya slightly regressed into his host's skin at that remark, "N-no! I didn't mean to imply that!" he hastily got out.

Katsuki scoffed a bit at the obvious lie. "Bullshit! You know what?! Fuck this, you get to type it now, nerd!" the blonde angerly ordered as he wisely and with no hesitation slammed his smartphone inside of the slimebiote's gooey head. It was now completely consumed, suspended motionless exactly like aspic.

Midoriya, who was in utter shock and in disbelief at his host's actions, wordlessly tried to fix the situation. With slight slowness, the slime's head and neck began to sliver out of Bakugo's left forearm. The neck eventually stopped growing and shifted into his shoulders, then his torso/arms, and so on until eventually almost the entirety of his gooey body was outside of host, sitting across from him; the two of them were now only connected by a six foot-long slimy 'rope' that came out of Bakugo's left shoulder, roughly half an inch in diameter. Izuku then proceeded to open up his left side of his head, which made a wet sloshing sound as the slime that composed him moved aside. When there was enough space he finally grabbed his host's phone and started to fix what was typed, letting his head close with an audible pop noise.

This all happened in a span of ten seconds, and while lesser men would've pissed their pants or died right then and there, Bakugo was none of those things. Throughout the whole experience his eyes were wide saucers, in amazement of what his friend could do the Quirk he acquired could do. Ignoring the plethora of typing noises from his phone, Bakugo moved his right hand closer to the 'rope', trying to use his index finger and thumb to pinch it. Unsurprisingly, his digits went through the goo and touched themselves, the 'rope' moving around the obtrusive appendages to keep the connection between host and slimebiote. Looking a bit closer revealed that...something was traveling through the 'rope'. It felt as if the rope was less a rope and more like-

"An IV?" Bakugo questioned aloud, looking up to his partner for clarification (who was currently typing at Herculean speeds).

Midoriya's typing speed slowed down as he tried to carefully word his next sentence, "Um...y-yes? Y-you could c-call it t-that, but I l-like to c-call it a SIV (Slime Interbody Vessel)," he stuttered out, feeling his old friend (anxiety) grasp him in a chokehold.

"What's with the extra stutter?" the blonde asked, an eyebrow raised.

"I-I'm n-not-" Izuku stopped himself, taking a moment to try and collect his thoughts. "I may have sorta forgot w-what it's like to be...vulnerable again," he admitted with a dark green blush on his face, but it sounded more like a question than an answer.

"The fuck does that even mean?!"

"It means..." Midoriya paused again as he tried his best not to sound weird, "It means I felt s-safe and protected w-when we were t-together."

An awkward silence descended upon the two teens, both of them sporting a dusting of color on their respective cheeks. Not that they'd ever admit to that, of course.

"Anyways...uh, wanna make t-those rules?" the slime lamely asked, to which the blonde readily agreed to.

The teens had ended up talking back and forth for several hours, discussing what should and should not be on the list. Many, many, many arguments later and they had finally finished, ending up with six rules in total; Midoriya definitely had a problem with Rule #5, but he decided to stay quiet when his host literally passed out after writing Rule #6.

The moonlight flowed in from a window, allowing the slimebiote to see mostly everything in the room. Seeing as how he'd be awake all night (slimes didn't need to sleep), Midoriya decided to...peruse Katsuki's bedroom. Unlike what Bakugo Mitsuki showed in the bathroom, his host had a much cleaner organization system. The bedroom was nice and orderly, no garbage overflowing and a full hamper that looked well used. He had an white oak desk that had a finished math quiz on it, with a backpack on a chair before it. Taking a closer look, Izuku noticed that something felt off about the paper.

Maybe it was the graphite that wrote the Hiragana. Maybe it was because the paper was warped, looking like it got submerged in water before it dried. Maybe it was just his instincts acting up again. Midoriya didn't know, so he chose to ignore it for something much more interesting: The quiet breathing body on the bed.

It was his host (of course). Bakugo was...Kacchan was sleeping so peacefully that it made Midoriya jealous. He wondered what it would be like to sleep, to not have to think for a solid 6-8 hours of the day. Kacchan, still in his tranquil sleep, breathed in and out uniformly. Izuku always felt that process, an action a person always did day in and day out never got enough attention. They breathed passively, but if they thought about it for too long it'd become a manual process. People always went to bed never thinking of how they breathe, somehow always assured that they would keep breathing throughout the night.

"It's amazing what everyone does," he thought to himself with a small smile, risking his life as he decided to comb his slimy fingers through the blonde's hair. It felt soft and fluffy, as if Kacchan used quality materials to make sure it'd stay that way. As he was now, it was a little disconcerting to be looking at his new (potentially permanent) host being so defenseless. His normally scary face (not that he'd ever tell him that) looked so soft, like it had never seen the horrors of life. Kacchan (from how little he knew him) always acted so confident, so strong that it made Izuku's non-existent heart throb in worry. Anyone could just waltz into this room and...and hurt-

No, he wouldn't let that happen. He wouldn't let anyone take his new friend away from him (except his friend's parents, of course). Kacchan gave him hope when he had none, gave him life when he was at death's door. He'll make sure that Kacchan will achieve his dream and then some, so that he could show how utterly thankful he was.

But in order to do that, Midoriya had to be useful in a way that mattered. If all he could do was heal and change some body parts around then he was useless.

Worthless.

Like the trash on the side of the street that not even the garbage men would clean.

Kacchan wouldn't have offered this partnership to just anyone, only to people with potential to be the best. Midoriya knew that much about his host, so at the very least he had to show that he was a useful asset, right? Sneakily, so as to not wake up the blonde, Midoriya turned on Bakugo's phone and searched on the web browser, "The Human Body." The wiki article had at least hundreds of hyperlinks, with each one having hundreds of their own. Diagrams, medical jargon, technical stuff that he's never even heard of before. It was going to be a long night, but he psyched himself up, knowing that once he got useful his friend was much less likely to abandon him.

Midoriya didn't know what he'd do if that happened.

Bakugo Katsuki's and Midoriya Izuku's Rules for our Partnership 1. I, Midoriya Izuku, will not interact with Bakugo's family in any way until my host (Bakugo Katsuki) allows me. This is for my own safety and also for the benefit of my host, who would miss me needs my help to be the Number One Pro Hero. 2. The nerd cannot be seen by anyone under any circumstance, unless it's to save me. And I can't use the nerd for anything bad (as if). 3. My host and I will work on our Quirks every day after school (maybe at a beach?) to become, "The best goddamn team ever," (Bakugo Katsuki). 4. 'Slimefuck' is not a nickname, and I 'should' use Slimefuck's his real name. 5. This is a partnership, not a friendship! And we're equals, not like a master and pet or whatever! But of course, I'm more equal than Slimefuck Midoriya. 6. If there's a problem then fucking speak up about it.