I Don't Love You|Oikawa x Tsundere Reader

Stars

You stand on the floor of the tournament place's gymnasium bouncing a volleyball on the ground. The female volleyball team is having a game with Karusono's female team and it was your serve. You grasp the ball as it comes back up from the ground. You do a perfect jump serve and it sores across the net and scores a point. Turns out Karusono couldn't receive well. Hum, who would have known? One more point until you rotate. You do a normal serve this time and it is just barely received by a small girl with beautiful black hair. It's sent to their setter, who does a horrible toss and messes up the spiker. The poor girl misses the ball completely and it falls to the ground with an oof. Man, their team was not in good shape.
That scored your team another point and you all rotated. You were in the back still, in the middle of Anko and a blond, Saiko. Saiko did a perfect serve and sent it flying across the gym. The captain of Karusono received it and the setter did a better toss this time, not as good as your teams star setter, Mayu, but there is no setter better than her, well, except for Oikawa that is. No one is better than Toorū. No one.
The spiker hit the ball this time, but Anko received it.
"Nice receive An-Chan!" I yell at the girl.
"Cover Mayu!" An said after she thanked me quietly.
"Gotcha Anko!" Mayu said as she tossed the ball to Haruhi, an okay spiker but not the best we have. Haru scored the point and did a little victory dance.
"Nice kill Haru!" We all yelled to the tall girl.
Haru and Mayu did a little high five.
That made 20 points. The score was 20 to 12. After a few more points You would be in the front. You could feel the ball come in contact with your palm, feel the weightlessness of the high jump to get to that ball, feel the anticipation as the ball flies over the net waiting for it to hit the ground inside the boundaries. Oh how you loved it.
You rotated once more and now you were right behind Anko. Haru was now in the server position and did an amazing serve. A girl on the other team received it and sent it to the setter. The girl tried to do a setter dump but ultimately failed. It was quite rushed so it was easy to spot. Anko received the ball and sent it to your setter, the setter tossed it and Mayu spiked it across the net and it landed just before the 'out' line.
"Nice kill MayMay-kun!" I yelled at Mayu.
Said female blushed at the nickname and yelled her thanks back at me.
One more point and you were at the front. It was so close you could feel the soft material of the volleyball hitting the palm of your hand already.
The same thing happened again, but this time, the setter did a seriously good setter dump, earning us another point. Everyone rotated positions and this time you were in the left spiker position, even though you wished that you had been on the right side,and you were ready to spike that ball and earn the team some points!

{Le time skip brought to you by Iwaizumi Senpai}

It was now the second set, Karusono losing by 6. The score was 20-14, you knew you guys had an advantage over this weak team.
But one thing knocked you off balance when you were about to do the winning spike, specifically a brown haired setter boy, the so called "great King." Oikawa walked in front of numerous people in the bleachers, sitting down in the front row in the middle yet closer to the Aboa Joshai side. He gave you small wink his silly peace sign and turned to his fangirls which started to surround him, wearing that fake ass smile he always wore around girls like that, girls who would never know the real Oikawa Toorū. Your short, tiny form fell from the high jump you were in and smacked butt first onto the hard gym floor.
You let out a pained yelp rubbed your backside a bit while trying to get up. Your whole team soon surrounded your figure and you were hit with a brick wall of your teammates worries.
"Holy crap (name) senpai! You hit the ground really hard are you okay?" A first year, Rika, asked with a worried expression.
"Yes, yes I'm perfectly fine just a bit sore is all I can still play." You said to the team.
'Shit I can't believe I didn't hit that all because of my fucking jealousy, why does HE of all people have to give me this feeling?' You thought to yourself as you pushed your small form off of the floor.
You looked at the bleachers to where Oikawa was. He looked shocked and had this really sincerely worried face. He jumped down from the bleachers and ran to you as your team pushed you to the side lines with the coaches, they didn't want to risk you "getting hurt" again. You sat down in a small chair next your coach. You slumped down, tears in your eyes.
'I'm not good enough, I'm never good enough, I'll never be good enough. I'm a total loser.' You thought silently to yourself as tears started to slowly slip from your eyes and stain your cheeks.
Oikawa finally reached the side lines and kneeled down in front of you.
"Hey (nickname)-chan, how you feeling? You hit the ground pretty hard, you could have hit that." He said sweetly with an actual smile this time.
"Go away Trashykawa, I feel fine. And I only stumbled because, well," you anticipated your words, he couldn't know you still liked him. "I stumbled because I forgot to practice hard enough and I'm just such a loser, I'll never be good enough. I should have payed more attention, practiced longer, practiced harder." You said while tears fell out of your eyes at fast rate. "When practice starts again I'm gonna stay extra I need it."
"(Name), that will destroy you, and I know that better than anyone. You know, I feel the same whenever I mess up or we lose a game, and Iwaizumi has always dragged me out of my depression and said that it will hurt more to overwork yourself. Remember how in Middle School I started over practicing, overworking myself, and you told me that I'm just destroying myself even more? Well I don't want that to happen to you (Name). Not one bit" Your childhood best friend raised up your chin a bit looking into your year filled eyes.
Not taking the affection, you flicked his fore head and turned your face away from him, trying to hide your blush.
'What a tsundere.' Oikawa thought to himself as he rubbed the spot you where flicked him.
There were cheers resounding from the entire gymnasium. You looked over to your team, your eyes still glossy from crying, to see everyone running over to you and Oikawa. Said third year moved out of the way and let the other girls glomp you. They won. Without you scoring the winning point. You smiled the same forced smile as the brown haired setter does when he's around his fangirls, as you tried to hide the sadness of not even helping. You felt underachieved. Fuck what Oikawa said, you were definitely practicing over time from now on. You had to be a star, like all the girls here, shine as bright as these stars, maybe even a bit brighter.