"Sir!" Bubblegirl shouted as she rushed into the room, "We've had a breakthrough on that l case!"

"Oh? What?"

"There's been a report that they're meeting with the League of Villains!" the blue-skinned woman said, looking down at the report in her hand, "Also, something else!"

"Something else?" Sir Nighteye muttered as he turned to the blue-skinned woman, "What?"

"Fatgum managed to retrieve a gun containing several of the quirk erasing bullets while on patrol!" she said, holding up a photo of the weapon and its ammo, "Also, the suspect the weapon was retrieved from apparently used the new drug on himself before being captured. He's currently being detained in a nearby Hospital."

"Detained?" the slender man hummed, "So we actually have a living suspect for once."

"Are you sure you're okay?" Izuku asked as the two boys stripped off in the changing rooms of the Fat Gum agency, "Amajiki-senpai was also shot with one of those bullets, and he had to go to the hospital."

"I'm fine, bro," Kirishima laughed, "I hardened up way before it hit me! Bounced right off!"

"But I smelt blood…" Izuku muttered, "Right when you were shot. I could swear I smelt blood."

"Well, maybe you were picking it up from the fight?" the red head hummed as he put away his costume in the locker, "Or like…you were smelling Amajiki-senpai's blood, or something?"

"No, it was different," Izuku muttered, hand going to his chin as he began to mutter, "It smelled…wrong. Like it was full of chemicals."

"Full of chemicals?" Kirishima hummed, "What do you mean?"

"They didn't tell us anything about the weapon or bullets that were retrieved from that guy," Izuku continued, "Maybe they were special? But how? And why? What would be the purpose of injecting people with blood?"

"Maybe it's someone's quirk?" the other boy shrugged, "I mean, your quirk does all sorts of crazy stuff with your blood. Maybe the other person's does as well?"

"Another blood quirk?" Izuku muttered, "But that doesn't explain the reaction of the man after you said he took something…"

"Oh, yeah," Eijiro replied, "He was going on about blood and stuff. Kind of reminded me of you actually."

"Of me?" Izuku blinked in shock as he looked up at Kirishima, the red head nodding slightly, "But that could mean…no, that's impossible! We've been really careful!"

"What are you talking about, Midori-bro?"

"Heyo! You two done changing?" the pair jumped as Fat Gum stuck his head through the door, "Come on, we're having fried chicken tonight! Make sure to eat it all! You're growing lads!"

"Yes, Fat Gum!" the two shouted as they quickly finished changing and followed after the rotund Hero.

"So," Shigaraki chuckled as he held up the phone, the two of them sitting in Overhaul's mostly empty meeting room, "This was you, right?"

Overhaul looked at the headline on the phone, nodding as he read it, 'New Street Drug Discovered'.

"The first batch," he said slowly, "It's still in the testing phase right now, but there are plenty of subjects out there. We'll get it right soon. Especially with the Doctor's notes."

"Good to hear," Shigaraki cackled, "I have a special gift for you. How about we give you some fresh samples?"

The portals opened behind Shigaraki, Overhaul lifting an eyebrow as he watched the humanoid creatures shamble through, their eyes vacant as they swayed back and forth, their skin a sickly grey, and their brains exposed.

"Nomu, huh?" the yakuza hummed, "Interesting."

"The latest in the Doctor's experiments," Shigaraki explained, "They should be able to provide you with more than enough to get the "drug" working as needed soon."

"You're saying they all have the Vampirism quirk?" Overhaul hummed, looking back at the four creatures as Shigaraki nodded, "Good. The current test subjects die too quickly when we harvest them, these should be more resilient."

"Now," the pale-haired man said as he leaned forward in his seat, "How's our latest order coming along?"

"Izuku!" "Midoriya-senpai?"

The green-haired teen turned as the three girls approached him and Kirishima, the two standing on the platform as they waited for the train.

"Are you also getting on this train, kero?" Tsuyu asked as she and Ochako suddenly hugged him, making the teen blush.

"Yeah," Eijiro cut in, "Fat Gum sent us a message to head to a different location from where we usually meet up. It's kind of weird."

"Oh, us too," Ochako hummed, pressing her face into Izuku's chest as the boy blushed harder, "Ryukyu told us to head to a different building today."

"Uhm, Uraraka-san?" the small bat-like girl behind them said softly, "I think Midoriya-senpai might pass out if you don't let go of him."

"What?" the brunette asked, looking up and immediately struggling to hold back a laugh, Izuku's face completely red as he glanced around at the other commuters staring at them, "You look like a tomato, Izuku!"

"S-sorry!" he managed, slowly peeling the girl off him, "I just didn't expect that."

"Well," Tsuyu cut in, "Our train is here, so we better get on."

"Huh?" Izuku yawned as the five of them walked down the road, "Isn't it weird that we've all been heading in the same direction this whole time?"

"Yeah, a bit, kero," Tsuyu hummed as Ochako nodded.

"It's strange to see you tired though, Izuku," Ochako hummed, "Is something wrong?"

"Not really?" the teen sighed, "I've just been having these…weird dreams lately."

"Oh, hey, it's the big three! Hey senpais!" Kirishima called as they all walked into the same building.

"Eraserhead? And Shinso?" Izuku gasped as he saw the two of them standing in the lobby of the building, "What's going on here?"

"Dunno," the purple-haired teen muttered, "Just that we're here for a special case or something."

"Alright everyone!" a voice shouted, drawing their attention to the front of the room, "As I'm sure many of you know, I am Sir Nighteye. Thanks to the intel your various groups have provided, we have made great headway into a case we've been following."

"Woah! That's Sir Nighteye! He was one of the only people All Might ever took on as a sidekick!" Izuku breathed as he near vibrated in excitement, the two girls just smiling at him.

"As such, the small organization known as the Shie Hassaikai is plotting something, and we are here to discuss everything we know!"

The atmosphere in the meeting room was tense as the various Heroes sat around the large conference table, the students chatting quietly to each other as Bubble-girl and Sir Nighteye gave a brief explanation of the situation.

"We have also made a massive breakthrough," Nighteye said, "Thanks to the efforts of Fatgum and several of his sidekicks, we were able to get our hands on a set of special drug dispensing bullets."

"Drug dispensing bullets?" Rocklock asked, "What's the point of that?"

"To erase quirks."

The words sent the room into a deathly silence, everyone staring at Sir Nighteye in disbelief as he calmly shuffled the papers in front of him.

"One of Fatgum's intern's was shot with such a bullet, but has thankfully recovered fully," Nighteye continued, the room all turning to look at the three of them as Amajiki slowly lifted a hand, one hand turning into a cow hoof as he did so, "But, this does not mean that we can be complacent! Just because the effects seem temporary, doesn't mean that they aren't developing a more permanent version!"

The Heroes nodded, the students glancing at each other in shock.

"Another matter that complicates things is the new drug," Sir Nighteye said, "From what we've gathered, it is being called 'Dhampyre', and boosts your physical strength and regenerative abilities. However, it also prevents the taker from using their quirk and sends them into a blind rage."

"Like that guy I fought," Kirishima whispered to Izuku as the two nodded to Fatgum.

"You said he was going on about "blood", right?" Izuku asked, Kirishima nodding.

"It was all he could say. Just "blood" over and over until he passed out," Kirishima muttered, "It was kind of creepy."

"Hold up," Rock Lock cut in, "What kind of a name is that? 'Dhampyre'? Sounds English."

"A Dhampyre is a half-vampire, usually created when a vampire and a human…uhm…" Izuku said automatically, freezing when the room turned to look at him, "S-sorry, I didn't mean to interrupt."

"Half-vampire?" Rock Lock scoffed, "What? Are we in a Bram Stoker novel now? Anyway, what are these kids doing here? Isn't something like this too dangerous for them?"

"Normally, yes," Nighteye replied, "But we need all the help we can get while keeping this operation as secret as possible. As such, we need their help."

"Ridiculous," the man sighed, slouching in his seat.

"Carrying on," Nighteye hummed, "Would Izuku Midoriya please step forward."

"Y-YES?" Izuku squeaked as he shot up out of his chair, the other students looking between him and Nighteye with worry, "W-what can I help you with?"

"In the report you wrote for the initial incident," Nighteye said flatly, glaring at Izuku over his glasses, "You said that you smelled blood after the bullet hit Red Riot, correct?"

"Y-yes sir!"

"And that the blood smelled different, like it was mixed with chemicals?"

"Yes sir!"

"What the hell does this have to do with anything?" Rock Lock spat, "And why are you interrogating this kid about blood?"

"Because," Nighteye said, shooting a glance at the other Pro, "The bullets we recovered were found to have cells in them. Human cells."

"Human cells?" the room whispered as they all stared at Nighteye.

"But what does this have to do with this kid? Are you saying he's the source?" Rock Lock growled, moving to get out of his chair.

"No," the old voice said as the door swung open, the room turning to watch as Recovery Girl walked in, a grim look on her face, "At least, not of the bullets."

"What?"

"I've called in Recovery Girl for a very special reason, one involving a person that is currently in this room. Your quirk, Midoriya-san," Nighteye continued as he turned back to Izuku, his eyes hard, "It is called Vampirism, correct?"

"Y-yes?" Izuku replied.

"And it gives you all the powers of a Vampire and more, correct?"

"I…I suppose so?"

"Such as being able to turn others into Vampires."

The room went quiet as everyone turned to the boy, a cold sweat running down his back as he swallowed nervously.

"I…I don't know. I've never tried to…to do that, sir."

"Stop toying with the child and get to the point, Mirai," Recovery Girl suddenly growled, smacking the Pro in the leg with her cane, "He doesn't need any more stress than he already has."

"Very well," the man grumbled slightly, before readjusting his glasses as looking straight at Izuku, "The bullets are not the only thing we have found human cells in. We have also found them in the drug known as Dhampyre."

"Also?" Aizawa growled, looking at Izuku in shock, "You don't mean…"

"Not exactly," Recovery Girl cut them off, "The genetics of the cells don't match Midoriya's, except in the case of the quirk factor. There, they are almost identical."

"Identical?" Ryukyu muttered, "But that's impossible."

"Not for a quirk capable of overwriting other quirks," Izuku breathed, "Oh gods, my quirk can overwrite other quirks, can't it? That's why the people who use Dhampyre can't use their own quirks and crave blood!"

"That's the theory," Recovery Girl sighed as she sat in the chair offered to her by Bubble Girl, "But there is still a lot we don't know about quirks in general, and your quirk specifically."

"But…but how did they get some of his blood?" Ochako asked slowly, looking up at the pale Izuku in shock.

"We're not sure," Nighteye sighed, "As far as we know, they may have stolen a sample from the labs at UA, or possibly retrieved some from a battlefield. But until we determine how th-."

"My arm…" Izuku said, staring blankly at the table, "I…I cut it off. Because Shigaraki touched it…they must have…they must have gotten it before it completely decayed away."

"Shigaraki?" Nighteye growled, "That's the name of the leader of the League of Villains. This proves our suspicions correct, they have been in contact."

"But if the other DNA isn't mine then that means…" Izuku stopped, staring at Recovery Girl in shock, his hands shaking as he gripped the table, fingers digging into the wood.

That they've been using your blood to turn others into Vampires," Nighteye finished for him, "Though the process seems imperfect at the moment."

Izuku fell back into his chair, his eyes wide as he tried to process the new information. He stared blankly ahead as the meeting continued, the others casting nervous glances his way until the students were all asked to leave.

"Izuk-!" Ochako and Tsuyu started, immediately being cut off as Mirio stepped forwards, a grim look on his face.

"Midoriya," he said as he walked up to the still stunned teen, "I need you to check something for me."

"I…what, Mirio-senpai?" the Vampire muttered half-heartedly.

"Does this…smell like the blood from the bullets?"

The students paused as they watched the teen pull a plastic bag from his back pocket, inside a bloodied handkerchief. Izuku recoiled slightly as Mirio opened the zip lock bag, holding it out to him, before taking a tentative sniff.

"I…I think so?" Izuku muttered, "It's hard to tell, there were a lot of chemicals in the blood from the bullet."

"Then it's probably true," the blond growled, the others staring at him in shock at the vicious look on his usually bright face, "He is using her. That bastard! How could he do that to his own daughter!"

"Daughter?" Izuku blinked.

"You were probably too out of it to hear the rest of the meeting," Pipi cut in, "They think Overhaul has a daughter. A daughter Mirio-senpai met earlier this week."

"I met her on a patrol," the blond said, tears welling in his eyes, "She fell out of an alleyway and scraped her knee. I…I dabbed it with my handkerchief, but then…then he came."

"And you didn't try to rescue her?" Kirishima asked, Mirio shaking his head sharply as he wiped the tears from his eyes.

"I…I couldn't. I…Overhaul was there. I couldn't put innocent civilians in danger just to save her," Mirio sobbed, Amajiki and Hado moving to comfort him, "I should have…he's doing…doing horrible things to her! Using her to make those bullets! I'm sure!"

"Have you told Sir Nighteye, kero?" Tsuyu asked, Mirio nodding as he sniffed loudly, looking up as he schooled his face into a calmer expression.

"He was the one who suggested I ask Midoriya about the blood," the teen said, closing the bag and slipping it back into his pocket, "Just to be sure. We already had it tested by the lab, and it came back as a match, but… I had to be sure."

"We'll stop him," Izuku said suddenly, his voice surprisingly strong as he placed a hand on the taller boy's shoulder, "We'll save her together, and stop whatever they're doing to make more Vampires as well!"

"I…thank you, Midoriya," Mirio sniffed, smiling back at the green-haired teen, "I'll have you keep your word on that! Oh, and Sir wanted to have a meeting with Fat Gum and his interns after they finish up with the debriefing. He was very serious about it."

"Christ," Shinso sighed as he walked past the two of them, "It's like looking at a pair of twins."

"First, I would like to thank the three of you. Your involvement has advanced our investigation by leaps and bounds," Nighteye said as the three of them stood in front of him and Fatgum, the rotund Hero looking very serious, "Red Riot's assistance in acquiring the weapon and quirk erasing bullets, Shinku's positive identification of the source of the bullets, allowing us to create a more solid link between them and the Shie Hassaikai, and lastly Suneater, who was strong enough to resist the effects of the quirk erasing bullets. I thank you all."

"Thanks!" Kirishima blushed as he rubbed the back of his head, "We didn't really do much, but-."

"Nonsense!" Fatgum interrupted, "You guys helped us a bunch! Don't sell yourselves short!"

"Anyway," Nighteye cut in, "There is more that needs to be discussed. Namely about the criminal Red Riot assisted in capturing."

"He captured him all by himself," Fatgum muttered under his breath, whistling nonchalantly when Nighteye glared at him.

"As I was saying," Nighteye continued, "The man used a new street drug, which we have discovered to be known as 'Dhampyre'. Midoriya, if you would continue your explanation from the meeting."

Kirishima and Amajiki looked at each other in confusion as Izuku nodded.

"A Dhampire is the child born from the union between a Vampire and a mortal," the green-haired teen said, "Essentially a half-vampire."

"Exactly," the man sighed, "An apt name, considering the circumstances. Unfortunately, that man is now dead."

"WHAT?!" the three shouted, staring at Nighteye as the man adjusted his glasses.

"He died shortly after being taken in by the police. We believe it was a side-effect of the drug he took," Nighteye replied, "His body became extremely emaciated and he was severely anemic. His body gave up and essentially crumbled to dust about eight hours after injecting himself."

"Turned to dust?" Kirishima whispered, "He did suddenly get all weak and thin when I was holding him. Was it my fault?"

"No!" Fatgum shouted, "He died because of the drug, not your actions! You were simply trying to save the people around you! And you did! This drug apparently drives anyone who takes it into a frenzy, causing them to attack any and everyone in sight."

"Oh," Kirishima muttered, still looking down.

"It's quite a strange drug," Nighteye continued, "With a number of strange side effects. For example, it can only be used at night, or in places sheltered from the sun."

"From the sun?" Tamaki muttered, "Why the sun?"

"Because the taker will suffer extreme burns, even bursting into flame if exposed to sunlight shortly after taking the drug," Nighteye explained, the three students staring at him in shock, "It sounds familiar, does it not?"

"Y-yes," Izuku whispered, remembering the smell of burning from when his Sire had showed him the effects of sunlight on his body.

"As such, we want to know more on the nature of your quirk," Nighteye said, glaring at Izuku as the teen cowered slightly, "I have done some research, and Eraserhead and Recover Girl have helped me confirm some things. However, they both said that I would need to hear the truth directly from you. So, what is it?"

Izuku froze. His Sire had told him that his teacher now knew about their quirk, and that he'd asked that he not spread the information around without Izuku's permission. But this was almost too much, could he just tell Sir Nighteye about his quirk? About how he'd got it? Was it safe? The man was a sidekick to All Might, so he was probably trustworthy, but what of the other people in the room. Could he trust them? Would he be putting them in danger by having them know? Could he do that?

"I…I'll tell you," Izuku breathed, "But only you. Please."