Koy and Mei were on patrol, so far it had been pretty quiet, with no big attacks. "Seems pretty nice today," Mei said, putting her hands behind her back. "Yeah, it's...a little eerie," Koy tells her, looking around for a moment. "No need to be on edge, if something happens-" 

"We need help!" They soon got distress calls on their earpieces. "Where are you?" Koy asked as he talked into the earpiece. "We're on Bucklemen Street, we have a villain here trying to rob a grocery store, we're not sure what his quirk is!" the police officer said, Mei made a warp for the two to head to Bucklemen Street, seeing a man inside the grocery store with a grin on his face. "Careful where you walk, heroes! Hahaha!" He laughed, holding what seemed to be a pink ball. "That must be his quirk..." Koy said quietly, trying to find how to take him down. "What do we know about him?" Mei asked the police officer. "We've never seen him before, we're not sure how dangerous he is." 

"That's helpful..." 

"We couldn't have known him if he's a new villain!" 

"Oh, so you've never seen this guy before? Come on-" 

"Both of you, quiet." Koy said, ending their bickering before seeing the villain turn his back. "Mei, make a warp behind him..." he whispered, Mei nodded, making a warp behind the villain, and Koy walked in, taking a pair of handcuffs off of his belt loop, Mei followed close behind. Koy took a rock from his pocket, turning it into a club so he could knock him out, however, before he could get to the villain, he had seen their reflection and turned around. "Hah! You think you can stop me? Well...try this!" The villain then throws the pink ball of mist, aiming for Mei. "Look out!" Koy yelled, standing in front of Mei, and got hit in the back. "Ko- um...G-ground Breaker! Are you okay?" Mei asked Koy looked down at her, his eyes changing from blue to pink. "Yeah...I'm alright~" he said softly, having a soft grin on his face. Mei blushed before hearing the villain. "We need to stop him!" she said. 

Koy turned, looking at the villain. "Hahahaha! Have fun!" he yelled, going to jump out the window, but Koy used his quirk, causing a few rocks to turn into spikes, and pinned the villain to the wall, not hurting him. "You're not going anywhere..." Koy said. 

The police soon got the villain and put him in a cop car. "Thank you, you two, we'll get information on the villain and find out what his quirk is, though Ground Breaker doesn't seem hurt, so maybe it's nothing too bad," the police officer said, Mei nodded. "We'll be in touch," she said, warping her and Koy home. "That was a little anticli-" 

Before she could finish her sentence, Koy pushed her against the wall, his eyes still bright pink. "You look so lovely right now~" he said softly, taking his mask off his face, leaning down, and kissing her on the lips. Mei blushed darkly, trying to push him away for a moment. "Y-you seem pretty affectionate...we just got home though..." 

"And?" 

"W-what do you mean and?!" 

"I want you...all to myself~" 

He grabbed her wrists, pinning them to the sides of her head before kissing her once again, his kiss more passionate than the first time. Mei felt her face heat up from blushing but soon stopped resisting him. Koy grinned in the kiss, feeling her give in. He held her wrists with one hand as his other hand moved down her body, caressing her body. 

"This hero suit looks so sexy on you...but it would look so much better on the floor...~" he whispered into her ear, slowly unzipping her suit. "K-Koy..." she moaned out softly, biting her lower lip as he exposed her body. He let her wrists go for a moment to remove the suit from her body, revealing her muscular, yet slim body. He licked his lips, kissing her neck softly. "You're so beautiful, Mei~" he whispered between kisses, Mei let out a small squeak of a moan. 

Hearing this, Koy kissed her neck rougher, slightly biting as his hands moved to her back to unclip her bra, tossing it to the side. "Mmm...so perky...so perfect...~" he mumbled, trailing kisses down to her breasts, leaving small bite marks and hickeys on her skin. "A-ahh...fuck, Koy, what's gotten into you?~" Mei moaned out, seeing how seductive and sexual he was. She wasn't complaining, but he was never like this after patrol. Koy ignored her question, sucking softly on her breasts, his tongue swirling around her nipple as his other hand massaged the other breast. "So fucking tasty...~" 

After a while, he picked her up, carrying her to the bedroom before laying her down, kissing down her stomach until he reached her panties. "Heh, you won't be needing these~" 

"Mmm...t-this is embarrassing me!~" 

"Oh?~ Don't worry, cinnamon roll...you'll feel amazing when I'm done~ Now, be a good girl for your master~" 

"O...oh my...y-yes sir..." 

Koy's grin widened, moving down and slowly moving her panties down with his teeth, finding her wet pussy. "Heheh, mind if I get a taste?~" he asked but didn't wait for an answer, lowering his head down. "Itadakimasu~" he whispered, before kissing her lower lips. "A-ahh!~ Mmm~" Mei moaned out, laying her head back as she felt his warm breath brush against her sensitive skin. "Mmm...so sweet~ You really are a cinnamon roll~" he mumbled, running his tongue up against her lips, making her shiver softly. "S-stop teasing me...~" she said breathlessly, making him chuckle softly. 

He then moved closer, sticking his tongue deep inside her. "Fuck...I can't get enough of you~" he said, his tongue exploring deep inside her, using his long tongue to his advantage as she squeezed her thighs against his legs. "F-feels so good~" she moans out, her eyes rolling back from the pleasure he gave to her. He looked up at her as he eats her out, grinning as he slowly moved his tongue in and out of her. He could feel her twitch from inside as she clamped down on his tongue a bit. "Mmm, are you going to cum, baby girl?~" 

"Y-yes~ Please don't stop, I'm so close!~" 

"Heh, I love your whiny moans~ You want to cum?~" 

"M-Mhm~" 

"Come on baby, cum on my tongue~" 

As Koy continued to swirl his tongue inside of her, Mei moaned loudly and came, Koy swallowed down her sweet fluids. He panted softly before crawling on top of her. "I can't hold back...I need more of you~" he said breathlessly, kissing her passionately as he unzipped his pants. Mei kissed him back, wrapping her arms around him while he took his pants and boxers out, revealing his hard cock, then grabbed her hips. "Are you ready?" he asks softly, looking down at her. She nodded, letting out a soft breath. 

He smiled, and slowly pushed himself into her. "Mmm!~ Fuck, you're so tight~" he groaned out, gripping her hips tightly while Mei moaned out, feeling him impale her insides with his long shaft. "A-ahh!~ I-it's so deep already~" she whimpered softly as he slid the rest of himself in her. He held himself still for a moment so she could adjust, before slowly thrusting into her.

"Mei~" 

"Koy~" 

Mei wrapped her legs around Koy's waist, making him thrust deeper as she held onto him tightly. Koy panted and groaned softly, his thrusting getting faster and faster, his pink eyes looking deep into her eyes as he pumped deep into her. "I love you~ I fucking love you~" he groaned out, feeling himself throb deep inside her. 

"K-Koy~ I'm close~" 

"Me too, cum with me~ Please cum with me~" 

His thrusts became faster and harder, he kissed her deeply before giving her one final thrust, cumming deep into her. The two let out a moan as they kissed each other, Koy slowly layed down on top of her as his load came to an end. 

"Ahhh....ooohh, Kooyy...~" 

Koy smiled softly, looking up at her. His pink eyes then started to turn blue once more, and his seductive changed into a confused one. "Uh...Mei? H...how did we get back home?" he asked, looking down and blushing darkly. "W-when did this h-happen...?" 

Mei looked at him, blinking a couple times before the realization kicked in. "Ohh...that quirk made you- ahh...that makes sense." 

"H-huh?" 

"Okay, so, when that villain hit you with his quirk, your eyes turned pink, and you became...sexual." 

"O-oh...I see..." 

Just then, the phone rang. Mei reached and answered it. "Yes?" 

"Hello, miss, we have information on the villain's quirk, he makes others-" 

"Horny?"

"Y...yeah...how did-" 

"I figured it out through an experiment. Bye!" 

"Wa-" 

Mei then hung up, and cuddled close with Koy. "So, you don't remember anything that just happened?" she asked Koy, who shook his head. "No...I hope I wasn't rough or anything...though you have some bitemarks on you..." Mei just giggled, kissing her boyfriend on the cheek. "You're adorable...never change."

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Here you go :)