Poison

He is the substance that causes disturbances in her already turbulent life. She is the toxin injected by several bites on his being. Who poisoned who was indeterminate.

A story of how Toga Himiko's life went out-of-phase from villain to hero trainee and how Bakugou Katsuki realized that he couldn't escape those obnoxious things called human relationships.

A/N: Heya, guys! Vampir here. This story takes place after the Hideout Raid Arc and diverges from other villainous Toga incidents thereof. I also modified a few canon information for the sake of convenience so please be warned. These include Toga's quirk being able to copy both the appearance and the quirk of the person, Hatsume transferring into Class 1-A, and each of the dorm rooms having a bathroom of their own.

I do not own Boku no Hero Academia. This is a work of fiction which, to be honest, was a spur of the moment piece I typed during the wee hours of 3 AM. I won't go on saying this is my first fanfic because it really isn't BUT I haven't actually written a story for… uhm, like five years now? So I might be a little rusty but hey, that's what you would expect when you study Engineering. Your inclination to speaking and writing in English sorta drops exponentially (since Tagalog is my primary language, lol) but you'd be able to solve the free space path loss of a microwave communications system even while you're sleeping.

But enough the fuck about me. I hope you guys enjoy the story of this crazy duo and the rest of UA's Class 1-A.

Chapter 1: I Always Call You First

"Ah, she's here. The fucking traitor."

There was a voice. A sleazy familiar voice whose source seemed very near albeit pitch black darkness masked her view. Chills ran down her spine as she tried to move from her spot but to no avail. Her thoughts were hazy and centered on what was restraining her. Wait. Am I sitting down? Fuck. My wrists are handcuffed! And upon that realization flickered open the lights, wherein a group of familiar faces were staring at her unsightly. It was the bar, that past hideout the pro-heroes have raided. And there sat at the center was Shigaraki Tomura. He looked so fucking pissed.

"Toga. Stupid stupid Toga." At an instant, four of his fingers were already tightly gripping the girl's neck. Toga winced upon the contact.

"You whore! I know you betrayed our squad just so you can fuck with that rude, son of a bitch Bakugou 24/7," he spat menacingly, making the blond girl's eyes widen. Why am I back here?! I was just at the dorm a while ago!

Even without Shigaraki using his quirk on her, Toga was already petrified in her seat. "Let me go! Let me go, goddamnit!" she screeched. It surprised her that she only found her voice just now. The other villains simply laughed and one of them pointed at her.

"Hear that? She even swears like the bastard now!" It was Twice who made his signature finger-gun poses followed by a Korean finger-heart gesture. "They must be so in love, kyaa!"

And as if their boss wasn't already a threat, all of the other villains began to close in on their hostage as if her time came to be executed. Shigaraki's grip still didn't falter. Dabi, who was behind her, emitted his blue flames from both his hands and placed them near Toga's sides.

"I've just had dinner but now I'm wondering what a burned bitch would taste like," he taunted as his flames grew bigger. This time, Toga closed her eyes tight and wished for a damn miracle. Someone help me…! Mom? Dad?! Anyone?! This certainly didn't make her assaulter pleased. He closed in his grip with his little finger.

"Traitors like you should rot in he-"

At that split second, the walls of the bar came bursting with a loud booming sound. It surprised everyone and some of the villains got debris that fell on them. Toga couldn't believe it. Was she going to be saved by someone? Is she safe now? Judging from the scene, it looks like her savior was… an explosion.

"Alright, you motherfuckers! Step away from Himiko now or I'll fucking blow your brains out!" her rescuer warned, walking inside the bar through its newly opened door. Toga was very relieved that she was seeing her boyfriend, clad in his hero costume, and wearing his trademark smirk as he was about to save her.

"KACCHAN!" she screamed as the hand on her neck quickly let it go. The one called Kacchan claimed his place beside his restrained Himiko and announced, "That's right. Her prince charming is already here, you assholes!"

At his words, the blond girl's heart couldn't help but swell.

"Kacchan, I love you so much! You saved me! You fucking saved me! Let me get a kiss!" she squirmed in her seat, making her boyfriend face her. He then gave her a heartwarming smile. Bakugou Katsuki fucking smiled. And he was going to inch closer and closer to her lips when he started to speak.

"Himiko…"

"Yes, Kacchan?"

"I think it's about time you STOP YOUR SLEEP-TALKING AND GET THE HELL UP."

With an acute flick on her forehead, the handsome image of Bakugou was replaced with a groggy and annoyed one, looking her straight in the eyes. The comforter was still snuggly covering the both of them except for the blond boy's arm which after being a weapon's handle for forehead flicking was now resting on her back, pulling her closer. The now awake blond girl realized that she was only dreaming a while ago and that she wasn't a hostage or something like that. She widely grinned at the still angry boy and while blushing said, "I dreamt of you, my prince charming Kacchan."

"Fuck prince charming Kacchan in the ass," her lover replied and she received another death glare. But she just couldn't mask her happiness so she let that slide and snuggled closer to Bakugou. She wasn't in that dirty old bar. She was here at UA's dorms, more specifically in her beloved Kacchan's room. Although, they've been sleeping in each other's rooms alternately very frequently that she doesn't remember whose room this was, the smell of Bakugou on the bed and on the comforter gave it away. The said owner of the room could only sigh.

"You know, if you continue sleep-talking like that, I'd actually use you as my alarm," he said as he leaned towards Toga's face to give her a quick peck on the lips. "But alarms don't go off 10 minutes before the time they're supposed to so fucking work on that." His girlfriend puffed out her cheeks.

"I'd be lucky if the Kacchan in my dreams replaces you one day," she retorted, sticking out her tongue.

"Well, you're out of damn luck it seems. I ain't gonna be replaced, not even if you use your quirk to become another me, Hon." And with that, Bakugou got out of his bed and headed towards the bathroom.

Everyone would agree that the explosive boy was their least favorite person to be stuck with, especially when they would be alone with him. But Toga thought otherwise.

After a lot of drastic changes in her life, she was genuinely at peace whenever she was with him. When she firmly decided to go back home and tell her parents about her being a wanted criminal, she at first received so much scolding. But her mother couldn't bear it any longer and was just relieved that she was safe and that she wanted to turn things around. It wasn't easy. At all. The couple had accompanied her to the police to what she said was a self-surrender. The authorities were baffled as to why a murderer would have an instant change of heart. Oh boy, did she have a lot of explaining to do.

She stated her goals back then, back when she was still on the Shigaraki's side. And how, after running into someone who had a destructive nature as much as she had, she began to question why she was still doing such villainous acts. After one very long day talking in front of some judges and some elders where she repeated herself like a worn-out mixtape, she finally received her sentence.

"Toga Himiko. We have thoroughly reviewed your predicament. You are no doubt a criminal according to the law." Here we go, Himiko. Just accept it. Be strong. "But you are still a minor. Of 15 years of age." She blinked in surprise.

"So we have two options for you, young lady. Both would be for a lifetime, unfortunately." She gulped. Well, look at the bright side. You weren't sentenced to death. "Option one is to spend the rest of your life in prison. Since you are still a minor, you are to be sent to juvenile prison until you are old enough to be transferred to a regular one. And option two is…"

Both her parents held her hands tightly. Toga looked at their worried but encouraging faces as if they were gonna be there to support her all the way.

"You would have to become a pro-hero by entering a high school specializing in hero training. Your progress would be monitored and you would have to serve the country your whole life. That is all."

And with no hesitation whatsoever, Toga Himiko pledged to become a hero in front of the law.

"Hey, Himiko," Bakugou called out from inside his bathroom, snapping the girl out of her thoughts. "If you don't hurry up, I'd shower without you. And you'd have to wait the whole day until you get to see my body again." He smirked as he stood at the bathroom's doorway, wearing only a towel around his waist. This made his girlfriend blush tomato red and get out of the comforter right away.

"Don't start without me, you big meany!"