Izuku and Tokoyami stumbled back to Hawks' agency building, their calves completely thrashed from the non-stop racing they had to do. They had to race each other, race Hawks' feathers, even race Hawks himself... more than once. They did not win once. Although Izuku came closest of the two interns. He was only 15 seconds behind Hawks.

Hawks meanwhile, was having some ice-cream as he casually flew down the street, the odd loop-the-loop as he waited for the two students to catch up. "You two were pretty good today, but if you're already exhausted you're gonna struggle to be heroes!" Hawks called out to the heroes in training. The two seemed to pep up after this, forcing themselves through the soreness and speeding up to catch up with the pro-hero. "That's the spirit! Now come on, let's pick up a light lunch somewhere to eat back at the agency. Let's gooooo!"

The two U.A students each had some form of a meal picked up from somewhere, and both were fairly hungry, but didn't feel like throwing up during whatever 'training' Hawks had planned for the pair. Incidentally, the training happened to be strength training that involved a variety of strength from quirks, and raw strength that made both of them so sore it no longer hurt, and they felt like they were walking in honey by the end of it.

After several days with a mix of speed, reflex and strength training both boys would comfortably say they've improved drastically in all areas, whether or not their quirks were active. On this fateful day, Hawks informed the U.A students that they would be travelling to a different prefecture to patrol for the night, as to immerse them in a completely new environment whilst still tending to civilians. Hawks' rules for quirk usage was standard, except this time they would not be all sticking together. As such, they each had an earpiece and if someone was to engage in a combat situation involving they would need to immediately inform the others and disengage or defuse the situation unless their or someone else's life was at stake.

Regardless, they were meant to arrive in their location come next morning, taking an overnight train through Hosu. 'Hosu...' Izuku was lost in thought as the trio boarded the train, when Tokoyami spoke up. "Iida is interning with someone here, isn't he? The normal hero or something like that?"
"A-a-ah, yeah, I believe it was with Manual..." Izuku replied, a finger on his chin as he racked his memory, "I hope he's alright considering the Hero Killer: Stain is currently active in the area."
"Oh yeah Stain! Totally forgot about that guy!" Hawks interjected, "Maybe we just get off here and go hun-"

Hawks joke proposal was suddenly cut off as a large creature came crashing through the side of the train. The trio began moving on instinct, Hawks moved to minimize the creature's damage and try and defeat it whilst the students moved to evacuate and protect civilians. "Well, guess we're getting off here then!" Hawks joked as he sliced the creature enough to make it sufficiently incapacitated. The two U.A students had finished helping civilians and came to stand with their mentor, overlooking the city on flames. "Alright, plan and rules stay the same, except we're getting off here. So split up, keep an eye on your location if you need help and get all the experience you can. Good luck Tsukoyomi and Midori Raiko. Remember, speed is key. Let's Go!"

With those parting words, the trio dived out of the train, landing seamlessly as though they hadn't just jumped from the height of a three story building. Hawks went directly towards the source flames whilst the two students split off in different directions, skirting the edges and assisting with evacuation efforts. 'But with the cover of the chaos... now would be a perfect time for' Izuku's eyes widened with realization as he let his lightning fully envelop his figure. 'Stain normally strikes in alleyways, and considering the sharpness of my movements I can bounce through alleys until I find them... please stay safe Iida...'

After bouncing from building to building, scanning each alleyway as he went. He finally saw Stain, and Izuku propelled himself off the building faster than he had ever moved before.

"My name is Ingenium!" 'Ingenium' cried out indignantly, despite the fact that his helmet had been knocked off with nothing more than a flick of the Hero Killer's sword.
"Ingenium? I thought I already dealt with that fake hero." Stain replied plainly, eyes narrowing at the student before him. "A student? This isn't a good time to be playing hero, and I personally don't like killing kids. Now scra-"
"Fake hero?" 'Ingenium' replied, tears welling up in his eyes, "Ingenium was a wonderful well-respected hero, and a most excellent brother!" Stain did not reply as the student continued their emotional release, "As such he has asked me to inherit his name, and so I will arrest you in his place! Remember the name of Ingenium, as it will be the name of the hero who defeats you!"

Stain did not immediately reply, instead opting to gesture to Native, currently bleeding from a shoulder wound. "If you were a true hero, you would have saved them, rather than focusing on your pathetic little plan for vengeance." He spoke. The student seemed to only just realize if the widening of their eyes was any indication. However, rather than continuing the war with words, they charged up their quirk, engines based in their legs, and took a large kick.

Moving in a single fluid motion, he knocked the student to the ground and cut them with one of many, many blades. Licking the blood, he sighed. "If you are the future, we are done for." Stain stood over the top of the downed student, blade in hand as he aimed for where the student's heart should be. As much as it pained him to do this, which it didn't in any way whatsoever, he would have to rid the world of this fake hero. "Now die."

What Stain wasn't expecting, was for a little green blur of lightning to come along and completely annihilate the sword.

Izuku had propelled himself to Stain, moving at an unprecedented speed, and Iida was incredibly relieved that he wasn't going to die today as he noticed himself being pulled further down the alley and a confused Stain holding the handle of his blade. "Another kid? This isn't a daycare." Stain remarked, before pulling out another set of blade.
"Can you move?" Izuku asked Iida, who was still laid on the ground.
"No, it's part of his quirk, don't let him cut you. There's someone else near him, a pro-hero I believe." Iida replied.
"Do you know the current address?"
"I can figure it out."
"Great, speak it into this and explain the situation." Izuku said, handing Iida a small earpiece. Iida grunted and began to list out the information, explaining the situation and hoping that help would be here soon.

Meanwhile, Izuku stood, narrowing his eyes at his opponent. Stain. From the few reports, the villain fought based on a skewed justice system, with an abundance of blades and extreme speed. Looking at Stain's shoes and various armaments, that was more than apparent. Right now though, Izuku had to try and get the other pro out of danger. Bracing himself he let the green lightning envelop him as he grabbed the hero and pulled them out of danger with Iida, before Stain could react. 'The alley is too long to be able to drag one out and then the other before the Hero Killer notices, and trying to carry both out with the wounds they have would be disastrous, and Stain would easily catch up. Whelp. Here goes nothing.' Izuku placed the two almost victims of Stain's rampage behind him, and glided smoothly into the dodging stance. 'Hawks was right, this does get easier, but now is not the time for that'. Glaring at the Hero Killer, he spoke a simple demand. "I will not let you kill either of them, if you want to do that then you'll have to go through me."
"Ha. I like you kid. You have a bit of spunk. But unfortunately, I'm gonna have to kill them, whether or not you like it." Stain replied, gripping a pair of knives in one hand and a longer blade in another. Izuku didn't reply, instead opting to steel himself and moved some more charge in his hands. 'If there are any blade, I'll want to destroy them so he can't reuse them, and ideally if I can lay a hand on him I can shock him into submission or at least stun him long enough. There's not enough time where I can stand still and guide any lightning through the ground, so for now I'll have to do this. He'll probably start by throwing the two knives, and following up with a slice with the longer blade.'

Izuku's theory regarding how the Hero Killer would start turned out to be correct, two knives thrown in quick succession, both of which Izuku was able to dodge with little effort. He wasn't able to catch them but they simply flew past, further down the alley to the point where it wouldn't be practical for Stain to want to go and collect them.

Eyeing the blade, Izuku waited for Stain to rush him as he further steeled his nerves. In a blur of red, Stain rushed towards Izuku with his blade outstretched, and Izuku jumped back slightly as he waited for Stain to complete the follow through. As soon as he did, Izuku reached out with one hand and quickly grabbed the blade, destroying the blade and briefly shocking Stain.

Instinctively, Stain recoiled and looked at the now destroyed blade with confusion, before jumping further back into the alley. Izuku had managed to slightly graze his hand, and a small amount of blood steadily dripped out. Thankfully it wasn't enough to hold him back in any way. 'It wasn't the cut! But what was it then?' Looking back to Iida and Native, he was trying to figure out the common factor when it hit him. 'Blood! Something about the blood... any similar paralyzation quirks require some form of contact... and if he's so obsessed with blood then it's something to do with him touching or ingesting blood.' Izuku thought, glaring at Stain whilst in the dodging stance. "The look on your face, you've figured it out haven't you?" Stain spoke, meeting Izuku's glare with a bemused smile, "I'll finish off the thought for you. My quirk lets me paralyze an individual temporarily after ingesting their blood." He finished, showing off a grotesque tongue in the process.

'It doesn't change what I need to do,' Izuku thought, dodging another pair of knives, 'I need to stall until some back-up arrives, I doubt the Hero Killer will keep fighting if there's several heroes.'

"You're tenacious. I like you." Stain said, pulling out two more blades. "But, you must be put down, like the rest of these stupid fakes."
"Izuku! You should leave! Save your own life!" Iida called out as Izuku braced himself to avoid Stain's next strikes.
"No! I'm not leaving you here to die!" Izuku responded, simultaneously zipping over to Stain and destroyed one of the blades before zipping back, moving so fast he was nothing but a blur of green to those around him.
"It's not worth your life to save mine!" Iida replied, tearing up.
"So? That's a hero's job!" Izuku replied, dodging the other blade by the bare minimum, "To save those that need saving, no matter the price!"

Jumping back, Izuku took advantage of Stain needing to pull out yet another pair of blades to look at Iida directly. "And least of all am I going to leave my friend to die! So come on, we're going to live, together!"

Iida's eyes were brimming with tears as he watched his green-haired friend dodge a pair of knives. He gritted his teeth tighter as he remembered how he got into the situation.

Izuku was hit by a flying spike kick from Stain straight into his shoulder. Reacting quickly, he was able to shock Stain substantially, causing the villain to hunch over as Izuku gripped his shoulder. 'At least he won't be able to get any blood from that, but that's going to be troublesome when it comes to dodging.' Trying to move the shoulder, he found that it was incredibly sore and slightly sharp to move, but he could still move his arm and hand with no trouble. 'At least I still have that going for me.' Izuku braced himself, placing that shoulder behind him as he braced to dodge again, with Stain trying to stand back up, but still feeling some of the after-effects of being zapped.

"Ha... I thought there was no hope for the future generation... but you... hm. Well then young hero, let us test your mettle!" Stain rasped, licking his lips as he pulled out four blades instead of two. Izuku upped his charge, feeling the slight tingling in his muscles building up. 'I can't hold this upped charge for long, but Stain has started to take this seriously. I'll just have to ignore the numbness to be able to hold off.'

Clenching his fists, he would have to more proactively counter-attack, rather than reserve energy and exclusively stay on the defensive. Hopefully he could hold out against the well trained villain. 'Well, time to get experience the hard way!'