Warning: Mature tooth rotting fluff in the second part!

Kageyama couldn't understand what was wrong. His boyfriend Hinata would be busy all of a sudden, wouldn't look him in the eye and make stupid excuses to avoid him. At the beginning, he hadn't spent much thought on it... there was volleyball after all. Kageyama never minded that, however, his other team mates didn't look at it with such calmness.

"Did you two fight?"
Sugawara's voice was overfilled with motherly tenderness and Kageyama cluelessly tilted his head. Fight?
"Who?"
"Hinata and you. Did you two fight?"
Shaking his head, Kageyama continued the conversation with another question.
"Why?"
"Uhm... He has been avoiding you."
Kageyama narrowed his eyebrows and absentmindly rested his chin in his hand. Avoiding?
"Hinata is busy," he finally answered and Suga quirked an eyebrow.
"...busy, huh? With what?"

"Oe dumbass! We gotta practice more!"
Kageyama had a bunch of volleyballs ready to toss after practice and awaitingly stared at Hinata who, much his surprise, was already back inside his common Karasuno uniform.
"Sorry Kageyama! Gotta help my mother today!"
The ball in Kageyama's hands slipped and fell onto the ground, he watched Hinata jumping onto his bike and riding off. Help his mother?
"Uh... Fine... Yeah... See you tomorrow..."

"He had to help his mom," Kageyama confidently answered but his shoulders slumped down again at Sugawara's 'You poor child' mother-face. The setter fell back into thoughts, rewinding the following day, a Tuesday.

"Oe! Hinata! Where are you going?! We still didn't entirely perfect our quick attack-"
"Bye Kageyama!! Gotta do the grocery shopping today!"
Again, Kageyama dropped the ball he was exitedly holding onto and his tiny smile slowly vanished. Hinata rode away with his bike and Kageyama was left alone inside the gym, disappointingly packing up everything unneeded and practicing his serve instead.
"Okay... See you..."

"He had to go grocery shopping on Tuesday!" Kageyama exclaimed and Suga's expression turned only more pityful. Why was Sugawara looking at him like this? Alright then, Wednesday.

"Hinata-"
"Can't talk gotta go bye Kageyama-!"
Like the wind itself Hinata flew off on his bike, leaving a sad and lonely Kageyama behind to practice all by himself again.

A quiet snort pulled Kageyama out of his tiny flashbacks and his blue eyes darted over to Tsukishima, as always in company of Yamaguchi.
"Did you ever think Hinata might cheat? Think of it. He's avoiding you, can't look into your eyes, makes up horrible excuses... That screams for cheating~" the middle blocker chirped with a cold voice before turning with a scowl away.
"Disgusting."
Watching Yamaguchi nodding disappointed, Kageyama's breath hitched and he found himself curled up against Sugawara, trapped in a hug.
"That's why I think, too. But... best would be to just ask him. It's been three days since he started. We could be wrong, too."
Nishinoya smacked proudly his chest and stood straight like a soldier.
"I'll investigate for you~! Detective Nishinoya is on the case!"
"I'll join ya! Nothing goes unnoticed by detective Tanaka!"
Kageyama nodded silently and watched them storm off, clearly exited about this, and leaned back into the foreign but calming hug.

"Oe Kageyama-"
"We've got bad news."
Friday, a whole day later. Hinata had been neglecting extra practice with Kageyama again and Asahi's heart slowly crumbled as he saw the setter packing up all alone and by himself. He felt so sorry for him Asahi asked him for extra practice, only to see Kageyama's face light up just a little bit.
Kageyama, Sugawara, Tsukishima and Yamaguchi gathered around the two second years and listened curiously to their report.
"Hinata's been spendin' his time with Oikawa."
"Blushing, holding hands and going out for dinner in some fancy restaurant. We wanted to go in but then they'd have seen us."
"Sorry Kageyama."

Tsukishima shrugged, voice carefree and uninterested but his eyes told how much he despised Hinata for this.
"Lame. The Grand King steals his highness' boyfriend."
"Still a better lovestory than Twilight," Yamaguchi threw in but his voice was shaking with anger. Suga eyed his fellow setter worried and placed a hand on his shoulder which the trembling Kageyama shrugged off.
"Are you okay?"
"Duh he isn't," Tanaka whispered at Nishinoya and received an ellbow into his side from Suga. While the spiker collapsed with a cry of pain Kageyama just turned and left.

He was going to ask Hinata about this.
Kageyama's buzzing phone startled him out of his anger but it returned twice as hard as he saw the ID. Hinata.
"Hinata-boke!!" he yelled into the phone and the boy at the other end flinched.
"Oi oi don't shout!! Go dress nicely and meet me at the park yes?! Bye!"
Wanting to continue yelling at him, Kageyama realized in the same second Hinata had hung up.
"Asshole..."

Nevertheless, Kageyama hurried home and put on a nice black hemd with some jeans. Staring at his reflection inside the mirror, Kageyama came to a halt. Why was he even dressing up? Hinata was cheating on him with his former senpai and now worst enemy, Oikawa Tooru. He found himself way too nice dressed for such a cheater.
Could he help it?
Kageyama was so mad in love it hurted, slowly tearing his fragile heart apart. Tears rolled over his cheeks, leaving them flushed and swollen. Kageyama stared into his mirror and cried silent tears, fixating his own eyes since he was the dumbass who couldn't let go of Hinata even after that.

Kageyama grabbed his phone and purse before heading off towards the park. On his way, he stopped at a vending machine and got himself a pack of milk.
"You're making fun of me, aren't you?" he smiled grimly and entered the park, sucking on his straw. It didn't last long until he found Hinata, sitting on a bench and enjoying the warm sunrays hitting his face. Kageyama had to admit, he looked stunning.
But Hinata always threw him off of his feet... no matter positive or negative.