(*Please don't hate Ochako for this chapter, she's not wrong to feel the way she does. I also had to add some angst.*)

Katsuki not waiting for Izuku to take the first step, used his quirk to propel himself to his girlfriend. His palms lit up with a golden tinge of orange, fluorescent light as he sped over like a torpedo to where she stood. Y/n already knowing he would be the first to cave, wasted no time to surround them in pink smoke as he got closer. Humming to submerge them into a cloud of pink smoke. Both, Katsuki and Izuku knew breathing in the pink smoke would drug them rendering them useless. The positive they gathered from their training with her, was they had to breathe in the minimum as possible, to lessen the time it would take for her quirk to affect them. If they did this, they could fight and capture her before they became unable to. The training with her, was also training for them if they ever faced her in the sports festival as a foe.

The only way to get rid of the smoke was to either knock her unconscious, submerge her in water or blow it away. And that is exactly what Katsuki tried to do when he got closer and swung his legs forward, one arm pointed towards Y/n to attack her with one of his close-range explosions. Attempting to blow the smoke away with this strategy. This was the first time he was using a more powerful approach than he's had before. He knew he would take her down in an instant. There wasn't much Y/n could do with her quirk if it didn't work.

However, Katsuki breathed in the pink smoke more than he intended to, as he got closer. His senses becoming slower than usual.

Y/n was also using the full extent of her quirk she wasn't holding back. Unfortunately for Katsuki, once he took in a certain amount of her smoke, that was it for his quirk. Just like with Aizawa using his eyes. When Y/n used her smoke, her opponents quirk would turn off. Katsuki's eyes widened slightly when no sparks came out of his hand. And still in midair, he was losing momentum rather quickly, he needed to lessen his fall somehow. When the ground came extremely close, he tucked and rolled, tumbling, and rolling on the ground, causing some scratches on his exposed skin in the process. He was lucky he hadn't broken any bones, maybe a few scrapes here and there but it was better than the alternative.

Now on the floor, Katsuki was only a couple of feet away from Y/n. In the end he got what he wanted. However, he will have to fight in a daze because of her quirk's effects on his senses and fight quirkless. Still, this would not deter Katsuki Bakugou. No, this was the start for him. He was not a quitter, and he would fight until the end. Even if he was stumbling around drunk, as he attempted to get on his feet.

Once he was on his feet, though it took him a minute. He rolled his shoulders back to prepare for the fight. It's not like he hasn't fought with her before, they've done it many times. But this was different. In the training rooms, they would go slow to read each other's movements and give her practice of what to do when she was in a real fight. Her training with Katsuki consisted of using her quirk more, rather than just hand to hand combat like it did with Shouto.

Scarlet eyes met vermillion ones in a challenge. Both squaring off to go all out on this battle.

Not wasting any time, both ran towards each other, one's actions more sluggish than the other. Y/n will use the combat skills she learned from Shouto to fight Katsuki. She hoped it would be enough to take down the boulder of a man she called her boyfriend. She might not be as strong as him, but she was agile and fast. Like a graceful gazelle, who fought in swift and rapid motions. Since Y/n had the upper hand because Katsuki had no quirk at the moment, she took this chance to try and get close to him to hypnotize him with her purple smoke. She knew she wouldn't leave this battle unscathed. Still, she just hoped it wouldn't be bad to where she would have to go to recovery girl.

She would rather not go anywhere close to the nurse, for how scared she still was from any medical staff getting near her.

Nails digging into his gloved hands, tightly into a fist, Katsuki tried to punch Y/n at full force, and with each swing, she gracefully dodged each coming force with the palm of her hands as she expertly slapped his attempts away from hitting her. He would take a step forward, and she a step back in defense, when she dodged each hit.

A dance between opponents.

Grunts and palm's coming in contact with palm's, could be heard with every passing second, each swing and block coming and going as fast as it came. They both knew each other's fighting styles so well because of how often they trained together. This would not only be a battle of strategy but endurance as well. What made it harder for the h/c haired girl, was keeping the smoke up to keep Izuku at bay. She knew, once he saw the smoke Izuku wouldn't want to get close to it and breathe it in willingly because it would be a huge disadvantage for him.

He was powerful with his quirks, that was a no brainer. However, since he got his quirk from All Might, he's been relying on it too much. It's been a while since he's had to fight quirkless, and since training with Y/n he's had to get adjusted as well.

"Come on sweetheart, is that all you got?" Katsuki taunted her as he attempted to hit her again, and instantly being blocked away.

It also helped quite a lot that she was connected to him mentally, because she could see what he was thinking. Reading each move that came as fast as it popped into his mind. One swing here, a palm to push it away, a kick to throw of balance and a jump to dodge.

Heavily breathing Y/n grinned maliciously. "I think you're the one struggling here Suki, it won't be long now. We both now, you don't really know how to fight without your quirk."

Growling, Katsuki's eyes glinted with a promise to hurt. "Careful Y/n. Being my girlfriend doesn't mean I'm holding back."

"I would be insulted if you did. So, give me your best shot King Explosion Murder."

Katsuki getting tired of the taunting game, took one step back and swung harder than he's had, aiming for her stomach. Y/n wanting her own plan to work, and already knowing his intentions. Let his fist come in contact with her abdomen. Never one to shy away from pain, Y/n let it happen willingly to kickstart her plan into motion.

Fuck, it hurt. And it heard like it hurt, she was sure everyone in the vicinity heard the force of Katsuki's fist, meet her almost bare skin. The downside of her hero suit was, not much could protect her if she ever did get in a real fistfight.

The air was knocked out of her, and she wheezed and tumbled to the ground. Her hands reaching out to stop herself from fully collapsing.

Katsuki's eyes widened in fear when he realized it was harder than he intended to be. Sure, he wasn't one to hold back when fighting a girl, but he never did more than necessary when it came to fighting. Even if he threatened to kill people, he never meant it. It was only a figure of speech. He thought she was going to block like she'd been doing, and that is exactly what Y/n was counting on him to think. She needed to get hit for this to work.

However, seeing his girl, dry heaving and holding on to her stomach as she winced in pain and knowing he was the cause had his heart-wrenching. He knew he'd gone too far. Whenever they sparred, they tended to leave each other with bruises, but non however, left her looking pathetic like this on the floor.

Subconsciously he took a step forward to help her, already regretting the force he used.

"Don't you dare feel pity for me." Y/n's voice was hoarse and low, sending shivers of regret to the ash blond man.

Taking his shocked frozen state to her advantage, she jumped on him. Her body ached from the hit, but she'd dealt with worse. To her that hit was child's play. Sure, she hadn't been hit like that in a while, but this was a battle. She wouldn't start crying because of some pain and bruises. If she truly wanted to be a hero, she'd have to take everything in, even the pain.

Startling him, Y/n clung to him with all her might from behind him, keeping him in a headlock. She didn't want him to pass out, on the contrary, she needed him to take down Izuku. Because she knew, there would be no way she could take Izuku by herself. Unfortunately, she needed to use Katsuki.

Struggling to get her off him, Katsuki tried to pry her arms away from his neck. His windpipe being deprived of oxygen, always hating fighting close to close combat for this reason. He hated ending up in this situation, always getting claustrophobic. He never liked when an enemy was behind him, he still had trauma from the sludge villain incident in middle school. So instead of letting things get this far, he would usually take down his opponents in one go. However, fighting quirkless truly became a problem.

"I'm so sorry Katsuki, I know how much you hate this. But I must win... I just have to. My father will question what I've been doing with you three if I don't go all out. He may not hate you three, but he'll use anything to stop us from getting any closer than we already are. I just know it."

Unable to answer her and being in the perfect position she needed to set her next step in motion. Y/n turned Katsuki's head with her tight grip and kissed him hard. For the second time he was thrown off guard. However, it didn't take long for him to melt into the kiss like butter. His body relaxed becoming putty in her hands. With his help, he brought her to his front and gripped her ass, to hold her up, holding her closer to him, not leaving any space in between them.

Y/n pulling on the small hairs of the nape of his neck, made him groan to bend to her will. Slowly she slithered down his body and deepened the kiss. She really missed his lips. She's been craving them since they kissed that night in her room. This wasn't how she wanted to do it, but she was willing to play dirty if it got Aizawa to acknowledge her strength and back off from their relationship.

"Darlin..." Katsuki mumbled in between the kiss.

"Yes daddy..."

"Fuck don't call me that right now... We're supposed..." Y/n pulled him impossibly closer to her, biting on his bottom lip, "to be..." interrupting every word that left his mouth, "...fighting."

Every one of her actions, had him breathlessly under her control. He shivered from the feeling of her tongue, fighting with his own. Honestly Katsuki didn't give a damn about the fight right now, the feel of her lips on his made him crave for more. Gods he missed her lips too, the way she would breathe in between kisses to try and keep going, attempting to prolong it. He wanted to be somewhere right about now, somewhere alone with her, where they could play with each other.

Unwillingly a low moan left him, when she pulled him by the loop his pants and her hand brushed on his growing hard-on. He gripped the smaller of her back and without restraint fell deeper into the world of her love. He should be upset, fight her off, do what was right. They were still in class, but he didn't care. All his senses and focus were zeroed in on her, and the roller coaster of emotions she was erupting in him. He was falling into the depths of her desire, like a siren calling out to him, and he knew it was wrong to do this right now, but he couldn't stop.

He wouldn't.

What Katsuki didn't know was how much her quirk was affecting him in that moment, he breathed in too much of her smoke to think clearly. And that's exactly what Y/n wanted to happen. The kiss was just a bonus, to not feel bad in manipulating him.

At the same time, she was kissing him, she also blew the purple smoke into his mouth for him to swallow eagerly as they shared a passionate kiss. Hypnotizing him for her plan to work. This felt so wrong to her, on so many levels. She hated manipulating people to bend so easily like this.

However, a small part of her was excited. There was something so enticing of having full control of Katsuki Bakugou. The person who never gave up, never gave in. As quickly as the thought came into her mind, she brushed it off. She didn't know if she was ever going to be okay with her villainous quirk.

With half-lidded eyes, Katsuki continued to kiss his girlfriend without remorse or self-control. The kiss going from feral to slow and sensual, tongues intertwining, shared shallow breaths and the taste of each other so inviting and insatiable. He didn't care if he would be a tool for her now. He fell so easily into her trap, like a vixen trapping her pray.

Was he ashamed of it? Not at all. Would he get revenge later? Oh, fuck yeah, he would. He was going to make her squirm and melt, like she was doing to him.

Opening her eyes, and with annoyance in having to cut their make out session short. Y/n took a step back to look at her handy work. Katsuki tried to follow her lips as she stepped away from him. However, after the small resistance, she knew the purple smoke was working. He just stood there like a robot with eyes closed. He was still in there, she knew that. She however, always hated when he became a puppet for her to use to her disposal. Of course, she would never do that to him. But the thought of taking his free will, always made her feel sick inside no matter how many times, he told her to stop thinking that way.

A part of her would always hate this aspect of her quirk.

After calming her erratic breathing and taking small breaths to settle down. She called to him, "Katsuki open your eyes." It was a simple command, one to see if he was truly under her quirk. She knew he was, she just wanted to double check. Immediately Katsuki's vermillion eyes stared eagerly to her burning scarlet ones waiting for a command. "Can you tell me what you're thinking?"

In autopilot and with no fire behind the voice she loved to hear, he responded in monotone. "I'm thinking how badly I want to be alone with you right now."

Cheeks burning crimson Y/n gawked from his response. "Ahem, right... okay... Um saving that for later... I need you to do something for me."

"Anything."

Y/n grimaced, it sounded different when he said it while under her control rather than when he's said it willingly to her before in affection to prove his loyalty. Shaking her head from her grim thoughts and forcing herself not to cower away from her task, she took his hand in hers and kissed the inside of his wrist.

Katsuki could still see and feel everything, and he was endeared from the gesture. Knowing she was doing it to lessen the blow to his pride.

"I need you to fight and capture Izuku for me." Katsuki's vermillion eyes shown with determination to not disappoint her. Eyes glowing with flecks of scarlet. Before he could leave, however, she whispered. "But please don't hurt him too much."

Katsuki internally growled, he hated holding back. However, there was nothing he could do about it. He was under her complete command. He could not fight of her request even if he wanted to.

With only one nod in acknowledgment, he took off towards his new opponent. Disappearing within the pink smoke that surrounded them and was keeping Izuku away.

Izuku was nervous, still, he wouldn't back down. When he saw Katsuki willingly go into the smoke his eyes rolled in annoyance, he played right into what Y/n wanted. Izuku wasn't as power hungry as his childhood friend. He had to think rationally, knowing if he breathed in, even just a tiny amount of her smoke he would be affected and so would his quirk. Unfortunately for him, he needed to think clearly, he hasn't fought with someone as smart and cunning as Y/n before.

He's learned she's a force to be reckoned with in the months they've gotten to know each other and spar. It was almost like a chess battle of who could say checkmate faster than the other. It was one of the many reasons why he's fallen so fast for her. She wasn't just another pretty face; she was smart, deceptive in battle, selfless and strong both physically and mentally.

Startled out of his thoughts, Izuku's emerald eyes widened when he saw Katsuki running at him at full speed. Not wasting any time, he let blackwhip engulf Katsuki, trapping him like a caught fish.

Katsuki not showing any annoyance or emotion whatsoever, gripped the black-fluorescent whips with his hands and pulled with all his might, slithering out of the confinements easily and pulling Izuku towards him. Once Izuku was in his tight grip, he grabbed Izuku by the neck and tightened his hold to cut his airway.

Izuku's vision was darkening by the second, the corners of his vision turning into black fog. He kept trying to breathe and claw his way out of his friends tightened grip to no avail.

"K-kacchan..." Izuku's voice cracked while trying to wiggle out of Katsuki's grasp.

Izuku couldn't think a way to get out of his hold. He could use the air force of One-for-All to get out of his grip but being this close to him, would end up hurting his best friend badly and he wanted to avoid that. He could end up killing him, and he wasn't going to take that chance. He had to reach him some other way.

"Sn-nap out of it."

Not even sparing a second thought, Katsuki punched Izuku under the jaw and threw him to the ground with extreme force.

Izuku's shoulder hurt from the concrete and jaw ached from the contact of his fist. His bones rattled and vibrated with pain. Skin aching and hurting from being hit. He almost bit his own tongue. Damn it's been a while; he's felt Katsuki's full strength. Coughing and spitting out blood, breathing in heavily. His lungs burned from the deprivation. Danger sense, the part of his quirk that has kept him alive on missions for these past years, started to go off violently. Begging him to run away.

He spared a glance and saw the menacing look in Katsuki's vermillion eyes. His best friend's eyes, burned with glowing red flecks and on cue, Y/n stepped out of her smoke. Looking oh so beautiful and deadly at the same time. With slow precise strides she stepped into Izuku's eyesight and crouched low to his trembling form.

She reached out with her fingers and ran them through his soft green tresses, attempting to calm the erratic beat of his heart. And like a moth to a flame, and the show of love and tenderness, Izuku wasted no time in basking in the light of her essence.

"You can rest now Izu, let me take care of the rest." She whispered delicately to him. Sounding so sad and hurt.

He wanted to desperately help vanish those frown lines on her forehead, and the tremble of her lips. Izuku knew this would be hard for her, but he didn't realize how much Y/n had to push through her negative emotions of herself to use her quirk.

Y/n not wasting any time for him to start thinking clearly engulfed him in pink smoke, instantly relaxing his senses. Izuku's body slacked into her touch, his quirk deactivating. Blackwhip and danger sense vanishing like blown smoke.

"Good boy, just like that."

Izuku's eyes began to shine with the scarlet flecks, matching her own eye color. "Baby I-"

"I got you my sweet, freckled shooting star. I'm so deeply sorry for hurting you..." She leaned in and blew purple smoke into his parted lips.