Toxicity

CHAPTER FOUR:

A groan tore through Izuku's lips as he stirred from his sleep, neck and back aching in protest as he lifted himself from his lab's desk. Though in that movement a blanket that was draped over his thin form fell to the floor, causing a thin smile to curl at his lips. Kurogiri must have put this on him, although the mist being could have taken him to bed. A sigh parted his lips as he slowly pushed himself to his feet, taking the test tube filled with a thick green liquid and swirling the substance around. He hummed softly as he placed it back down before rolling his shoulders and stretching out his stiff joints, before moving to the staircase to go back to the main bar.

The warm light hit his eyes as he squinted them, adjusting to the brightness as he strode over to the bar, hoisting him onto the seat as a small green bento was placed in front of him. Emerald eyes blinked slowly as he looked up at the mist figure, a smile curling up his lips as he giggled softly, "I'm starting to think you like to take on this 'mother-figure', Giri~"

A long sigh was heard from Kurogiri as he placed a plate with two pieces of toast in front of him. His deep voice coaxing Izuku as he rests his head on the palm of his hand, staring at the purple mist figure, "That is not the case though I will take on a parent figure if I deem it necessary. Now, eat, go shower and then be ready to leave for school."

Izuku placed the corner of toast in his mouth, nibbling at it as he kicked his feet slightly. His train of thought drifting as he hummed softly – unknown to him – Kurogiri listened to the mindless tune that drifted in the quiet bar, the sound wistful and soft like falling snowflakes. His slender fingers gently placed the last quarter of toast back on the plate, swinging his legs to the side as his feet gently landed on the ground.

Giving a faint wave over his shoulder as he ascended to his room, dragging his feet on the old floorboards as they groaned under his weight. Green luminescent clouds escaped his lips and curled and twirled in the air like it was dancing as he slid into his room, back pressed against the door as he peeled his shirt off.

A shiver ran down his spine as the cool air of his room cause his skin to prickle, shoulders trembling slightly as he made his way to his small bathroom, stripping away the rest of his clothes as he stepped into the shower. His breathe hitching in his throat as he turned on the shower, cold water hitting his thin form before it began to warm.

He let the water pelt against his back as he looked down at his arms, noticing all the scars on his arms from training when he first came here.

. . . . .

Izuku a major thing you must work on when considering your own quirk is lung capacity. A way we can work this up is by improving your physical fitness and on breathing." Shigaraki listed off as he looked at the smaller, who was fiddling under the crimson gaze. The green hood hanging loosely off Izuku's frail form as he was led over to a bench with various sharp objects.

"You'll train with other weapons to ensure your ability to defend and attack in future assignments. However, judging on your physical appearance, we have to work on muscles and stamina first," Shigaraki motioned to the entire room, a grin forming on his dry lips as Izuku questioned him with his eyes, "Now, run around the room until you can't feel your legs and once that happens... Keep going until I say stop."

Training continued like this for an entire year until he was able to wield every weapon thrown at him with ease, and he was able to hold his breath for just under five minutes. Though the training didn't leave him without scars, playing with sharp objects would leave there mark on you somehow, which most scars seemed to be on his arms and chest, although he had plenty all of his thin ivory skin.

Although as time passed he was able to go on his first real mission, though it was small in comparison to others.

. . . . .

He was snapped from his thoughts as he shook his head faintly, his fingers combing through his damp hair as he released a green cloud into the air. Letting his head roll back as the spray of hot water hit his pale chest, cascading down it as his arm fell limply by his side. His fingers fisting and pulling at his locks as he grit his teeth, his other hand reaching up to switch off the water.

He only had to do this until the League attacks. He only has to see him and put up with him.

He stepped out from the shower, reaching for a towel as he wrapped around his waist, letting the cool room to prick at his wet skin as he let his dripping feet leave a trail. Opening the bathroom door as he walked over to the UA uniform, letting his fingers brush over the material before turning to open his draws to grab a clean pair of boxers, sliding them on as he let the towel hanging on his shoulders. Droplets running down his chest, his hair replacing each droplet and letting the race restart from his shoulders and chest.

He used the towel to quickly dry his green curly hair, throwing the towel on his bed as he grabbed the white long sleeved shirt, sliding it on as he began to fasten the buttons. Slipping on the grey blazer and sliding on the grey slacks, putting on some black socks as he fastened his red sneakers. Flexing his fingers as he reached over to look at his damaged mouthpiece, a frown forming on his lips as he had forgotten to prepare another mask.

"Well… Looks like I'm gonna have to be cautious all day…" Izuku released an annoyed sigh, grabbing his backpack as he slung it over his shoulder, pocketing his phone as he descended the stairs to collect the bento he had left on the bar.

He slipped it into his bag, waving to Kurogiri as he left the bar, dragging his feet slightly as he reached up and fiddled with the black studs in his ear. Keeping his eyes down as he reached into his backpack, feeling around for a lollipop and smiling when he found one. He unwrapped the purple sweet as he stuck it between his lips, the school's gates appearing in view as he drew near.

He kept his head down, lips firmly clamped around the lollipop as he made sure he breathed softly from his nose, only faint green wisps escaping into the air. He continued to fiddle with his ear piercings as he wandered around the school, looking for his classroom as the door of Class 1-A loomed over him. He slowly slid the door open, emerald eyes looking around the room before making his way to his desk, eyes gazing out the window.

'I hope I can gather enough info before Shigaraki attacks this place. The League of Villains is counting on me, I will not let them down. I can't. I won't. I don't care what it takes.' Izuku was so lost in thoughts that he didn't know that a majority of the class was already in the room chatting amongst themselves.

He chewed on the lollipop stick that hung loosely between his lips, the door slamming open as the number one hero, Almight burst into the room. Izuku jumped slightly alongside with most of the class as they collected their hero suits and followed Almight.

Izuku blinked slowly as he looked at the brunette grinning at him, her pink tinted cheeks raised from her grin as her eyes sparkled. They were doing a simulated Hero vs Villain training. Funny thing was he was playing a Hero, nothing new with what he was currently doing. He rolled his eyes as he waited for the signal to run into the room with Uraraka.

The only real problem with the villains they were facing was that they were Bakugou and Iida, Bakugou being the main problem. Izuku and Gravity split up to find the bomb, but as he divided with Uraraka he was quickly confronted with a said blonde haired male. A sigh was drawn from his rosy lips as he was barely able to dodge Bakugou's explosive attack.

Izuku didn't really speak and mostly stuck to dodging as he tried to build up his gas. His eyes widening as he slammed into a wall, grunting as he quickly recovered and flipped the blonde onto his back. Jumping back as he exhaled a small green cloud, using it as a smokescreen and disappearing down one of the many halls.

Enraged screams echoing down the halls as he hid behind a wall, catching his breath as he listened to the screams, falling into a daze with what the blonde screamed, "Why are you running, Deku?! This fight would be over quick if you faced me!"

. . . . .

He remembered his first mission. He could remember that night. The night one when his first mission was given to him and the night that he killed two people intentionally.

He remembers it as if it were merely yesterday, the dark streets were lit with dim street lights as he followed behind a couple. This couple happened to know something that the League didn't like but they were a minor nuisance that could be dealt with. All he had to do was kill them.

Shut them up, forever.

So as he followed the pair home under the moonlight he clenched his hands tighter around the knife in his hoodie pocket, breathing out a faint green cloud as he felt the shadow of the couple's house cover him in an inky black.

He crouched low as he made his way to one of the windows, a black abyss on the other side as he used the knife to help snap the lock off. He quietly opened the window, slipping into the room as his feet gently landed on the ground. Closing the window as he looked around the dark room, a thin figure curled up under the covers of their bed.

Izuku froze, his body going stiff as he hesitantly took a step closer to the figure, his emerald eyes meeting the face of a young boy with mid-neck black hair, his thin lips parted slightly as faint snores were heard. He felt his body slowly relax as he let his feet gently touch the carpet as he made his way out of the dark room, like a shadow disappearing into dark hall.

He released a soft sigh of relief, the tension in his muscles vanishing as he slinked his way to the room at the end of the small hall, the floorboards under the carpet creaking softly under his weight. His thin fingers tightened around the knife in his hand as he wrapped his other around the door knob, slowly turning it as he quietly opened it. He stood in the doorway, silently waiting as he was listening for cues that they were asleep.

After waiting for several minutes he felt his heart harden as his emerald eyes dulled, twisting the knife in his hand as he hooked his finger on his mouth piece and pulled it down. He left the green wisps glow in the dark room as he moved closer to the couple in their bed, exhaling a large cloud into the room as he plunged the knife down on the male's chest. Feeling the bone crack as he stabbed through the sternum of the man's chest, his eyes snapping open as blood pooled from his mouth. He pushed the hilt of the blade press harshly against the man's chest before pulling it out harshly.

His eyes flickered over to the woman who lay next to him, her eyes half-lidded as she gasped for breath as the green mist entered her lungs, attacking her lung lining like sand storm as it withered them. His dull green eyes met her red as he got up and walked around the bed, leaning over her as she tried to push him away, he attempts futile. His gloved hand gently grabbed the wrist that was trying to push him away, his hand quivering slightly as he quietly mumbled gently, "Don't fight… I'll make it quick."

With that fat tears rolled from the woman's eyes as Izuku adjusted the knife in his hand, resting the end of the blade over her heart as he pushed down, easily cutting through the flesh as if it were soft butter. Her crimson eyes widening as they dulled to a murky colour, the life having drained from her.

Izuku moved his mouth piece back in place as he slowly removed the blade from her chest, scarlet decorating the silver blade as he flicked the blade in the direction of the floor, removing some of the blood. He slowly made his way out of the room, closing the door softly as he re-entered the room with the boy in it, reopening the window as he looked over to the boy to see the same crimson eyes as his mother stare back at him.

This boy was now alone. He had caused it.

With that he slipped from the window, leaving a bloody handprint on the window as he ran from the building, disappearing into the dark of the night.

. . . . .

Izuku was snapped from his memories with a sharp punch to the gut, coughing as he stumbled back several meters. His eyes narrowed into slits as he bared his teeth and growled lowly at the blonde in front of him. He quickly took up a defensive position as waited for the other to attack again.

But only did he realise his mistake when Kacchan's lips curled into a manic grin, laughing as he wrapped his fingers around the pin on his grenade gauntlets. He gasped as a green cloud curled from his lips, fists clenching as he looked around the narrow hallway, unable to escape the blast that was about to occur.

His emerald eyes widened in horror as screams through his earpiece went unheard as he braced his arms in front of his face, closing his eyes tightly as the explosion bubbled out the gauntlet, shooting towards him like a firework as he felt it hit his forearms. He grits his teeth as the skin on his forearm bubbled and popped under the heat that was pushed against him, his back breaking through several walls as something sharp and long pierce his side.

He gasped for breath as dust covered the area like a thick fog, coughing up some blood as he tried to pull himself from the metal rod that was coated in his blood, crimson running down his chin like a stream. Izuku unevenly breathed as the dust finally settled back to the ground and he was finally able to pull himself from the metal rod that was buried in debris.

An animalistic growl tore from his split lip as he pressed his hand to his freely bleeding wound, a dark figure moving towards him as he pushed himself onto unsteady feet. His emerald eyes meeting ruby as he shakily took another defensive position, he couldn't take up an offense due to his wounds he was struggling to breathe regularly due to the rod possibly puncturing his lung.

He was an idiot. He thought he'd gotten better. He's so stupid! Master! Shigaraki! Kurogiri! I'm a failure! I'll always be useless! I can't even beat Kacchan… I'm a useless villain.

Izuku began to blink rapidly as he struggled to keep his legs struggled to support himself, falling to his knees as he pressed his hands to his wound, coughing harshly as blood splattered on the ground. Rushed footsteps moving closer to him as he continued to hack and splutter out more blood onto the stained ground. His vision waved as he shakily lifted his head, his blurry vision meeting concerned crimson as his sight faltered and began to turn black.

This was a failure, he's been practicing so hard. Why? Why couldn't he beat him! He wasn't supposed to weak anymore.

"So…. Why?" His words were a faint whisper as he collapsed to the ground, a steady puddle of blood pooling around his thin figure.