[NSFW WARNING: SMUT IN CHAP]
Mirio wasn't blind. He noticed that something had changed between you and Tamaki. You both had grown closer, more affectionate, all that because of one date? It must've been a really good date, but could that cause such a difference in their relationship?
Something was up, and Mirio was pretty sure he knew what.
And now, here he sat with Tamaki, doing his homework. They had just finished their practices, and were now hanging out together at Mirio's house. You were busy taking care of Eri, so you couldn't come over. But Mirio was fine with that because he needed to find out what happened between you and Tamaki.
"Alright guys, I'm heading out and I won't be back until later. Stay out of trouble!" Mirio's father called from downstairs.
"Don't worry, Dad. We will!" He called back, and as soon as he heard the door close, he turned to look at Tamaki. "So what happened on your date?"
"Well, we went to watch a movie a-and, uh..." Tamaki trailed off, rubbing the back of his head. He knew he should tell Mirio what happened, but it was difficult finding the right words to describe it.
"Something happened. Something's different between you two. Did you kiss? No, can't be that." Mirio bent down and studied Tamaki closely, looking in his eyes and scanning his face. He was so close, that Tamaki could smell the chlorine on him. Tamaki felt his face heat up at the proximity.
Mirio's eyebrows raised slightly, his expression changing, and Tamaki knew that he got it all figured out. The blonde leaned back, having a hard-to-read look on his face. "So you had sex, huh?"
Tamaki's face went completely red, and he nodded in confirmation. "H-how did you know?"
"There was something different between you two. And also, you have some hickies on your neck." Mirio answered, shrugging.
"So she was your first time? How was it?" Mirio questioned. He couldn't deny, he was a bit jealous, of both of you. Deep down, he always wanted to be Tamaki's first, but he never did anything to initiate it. And he also wanted you but knew he would get his fill when you two had your date.
"G-good, real good," Tamaki answered, using his binder to cover up the boner he was getting from just thinking about what happened that night. How good your mouth felt, how well your velvety walls squeezed his cock, milking him dry. God, he missed that. It was something he could get addicted to.
He didn't even realize how much he was turning on Mirio by just talking about it. Mirio pressed his lips against Tamaki's, catching him off guard for a second before he started kissing him back.
"Tell me about what happened," Mirio said after breaking the kiss, his voice low. His fingers ran over Tamaki's fly, unzipping his pants.
"This is okay, right?" Mirio asked as he rubbed Tamaki's clothed bulge, taking off his shirt and other attire.
"Y-yeah." Tamaki nodded, moaning softly, while Mirio pulled out his member, running his thumb over some precum at the tip. Mirio began to stroke Tamaki slowly, looking up at him and waiting for him to continue.
"W-well, I took her back to my place a-and when we got there she k-kissed me. Then she started to kiss my neck and give me hickies and g-grind against me, and it felt so f-f-fucking good." Tamaki began.
"What was she wearing?" Mirio questioned, stroking him a little faster as he grew more excited.
"She had this beautiful black dress that had butterflies on it with a v-cut a-and-"
"What could you see?" Mirio interrupted Tamaki, adjusting his grip so he couldn't hurt him, while he went continued to pick up the pace.
Tamaki struggled between, gasps, moans, and whimpers, trying to find the right words. After a bit, he forced some out. "H-her chest, her curves, h-her hips, her legs, and thighs."
"Fuck." Mirio groaned, the sight clear in his head. Tamaki could see how hard-on he had pushing against his pants.
"And I got to suck her, h-her br-brea- hah-"
"Then what happened?" Mirio questioned, getting all worked up himself.
"S-she got and top of me, a-and she began to- just like that-" Tamaki moaned, feeling himself grow close.
Mirio kissed his neck, kissing over the hickies that you gave him, then moving up to his ear and biting on it softly. "Did you cum inside?"
"Y-yes!" Tamaki finally reached his end, climaxing all over his chest and panting. Mirio panted too, sitting back and smiling. "Wow."
Mirio handed him a towel, letting him wipe off his little mess and come down from his high. "But that's not all that happened."
There was a more confident look in Tamaki's eye, as he crawled over to Mirio, now undoing his pants. He pulled out his cock, stroking him slowly. "She also did this."
Tamaki brought his mouth to Mirio's tip, sucking him softly, licking off the precum. He managed to wrap it around his length, bringing his head quickly to the base, his teeth lightly grazing his cock.
"Fuck, no teeth baby-" Mirio groaned, throwing his head back. Tamaki sent him an apologetic look, bobbing his head and moving slowly.
He coughed, choking slightly as he tried to mimic your movements. He forced himself to ignore his gag reflex, trying to pleasure Mirio. God, you made this look so easy, and made it feel so good.
"You're doing so well, Tama." Mirio praised, intertwining his fingers in his hair, pushing his cock further down Tamaki's throat and making him gag.
"Fuck, that feels good." Mirio moaned, enjoying the feeling of Tamaki's throat closing up on his cock. Mirio pushed Tamaki faster up and down, causing tears to well up in his eyes, and he finally finished in his throat, grunting loudly, gripping his hair tight.
Once his seed all spilled out into his throat, Tamaki, swallowed, showing him. Just like you did. Mirio smiled, grabbing his hips and moving him back up on the bed.
"M-mirio, wait." Tamaki stopped him. "I-I don't think I'm ready for that yet."
The bigger blonde pulled away, nodding. "That's fine, just let me know when you are."
And after each other up cleaning up, the two rest together in Mirio's bed, falling asleep in each other's arms, their minds set on you.
(A/N: Bye yeah I wrote this I can't
ALSO I HAVENT STARTED WATCHING THE MHA SEASON OR WHATEVER CAUSE IM WAITING TILL THE WHOLE SEASON COMES OUT SO DONT SPOIL ANYTHING
But Mirio in the water heheh I love him
Thanks for reading! Don't forget to comment and vote!
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𝐿𝓊𝓂𝒾𝓃𝒶𝓇𝓎 || Yandere!Tamaki x reader x Mirio
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