Kasamatsu Yukio knows Kuroko Tetsuya is just being polite. No. He's not BEING polite. He IS polite. Calling people with their last names and with proper honorifics is definitely considered as polite. He's just... somewhat disappointed because Kuroko still call him 'Kasamatsu-san' even though they've been dating for months. When Kasamatsu insist on just calling him 'Yukio', his light blue haired boyfriend would always reply– "But wouldn't that be impolite if I call you by your first name, Kasamatsu-san?" with his not-so-famous deadpanned face.

Kasamatsu always sigh when he remembers it. He snapped when he realizes that he's been thinking about it again that he forgot about how busy Kaijo basketball team is. They're actually pretty busy practicing inside the court and as the team's captain, he have to stay focus.

"Senpai! Kasamatsu-senpai! Senpai!" Kasamatsu felt a vein pops on his forehead when he heard Kise calling his name, repeatedly.

"Urusai!" Kasamatsu scowled as he kicks Kise on his back, making Kise lay flat on the court's floor.

"That hurt-ssu, senpai!" Kise whined, pouting as he turned to look at his senpai and he is quite shocked when he found Kasamatsu frowning even more.

"Is there something wrong, Kasamatsu-senpai? You've been sighing a lot lately-ssu." Kise asked Kasamatsu, wondering.

Kasamatsu sighed, massaging his temples. "It's nothing. Just get back to practice, Kise."

Kise hesitantly left Kasamatsu and decided to get back to practice but Kasamatsu's troubled face still hasn't left his mind so he decided to ask Moriyama.

"Moriyama-senpai!" Kise called while running towards Moriyama

"What is it, Kise?"

"Senpai, do you think something is wrong about Kasamatsu-senpai? He's been sighing a lot lately-ssu." Kise asked, wondering.

"Hmm..." Moriyama placed a finger on his lip while he think.

He smirked then slams his fist on his other hand, remembering something. "Maybe he got himself a girlfriend?"

Kise's eyes widened in shock. "Girlfriend-ssu?!"

"Yeah. I heard that Kasamatsu is already going out with someone so he rejected one of my classmates. Hmm~ so that's why~" Moriyama smirked, looking at Kasamatsu's direction.

"Ehh?! Girlfriend-ssu?! Really?! That can't be-ssu! We all know how bad Kasamatsu-senpai can handle girls." Kise gasped, looking at Kasamatsu.

He smirked, fakely while shaking his head. "Girlfriend, huh?"

Kasamatsu sighed. He's inside his bedroom with Kuroko in front of him since he, himself insists on helping him in Math. He snapped in his train of thoughts when he heard someone calling him.

"...matsu-san. Kasamatsu-san."

Kasamatsu blinked and saw Kuroko, looking at him worriedly. "O-Oh! Sorry about that. What's wrong?"

"I'm having a problem with question number 7."

"Ohh~ Let me see." Kasamatsu said then leans to look at Kuroko's papers.

After some minutes, Kuroko stretched his arms after he finished all of his homeworks. He looked at Kasamatsu and flashed one of his rare smiles when he saw Kasamatsu who already fell asleep on his bed while waiting for him to finish. He looked at the clock which's hanging on the wall and he sighs when he realized that it's already time for him to go home. He walked closer to Kasamatsu, sitting beside Kasamatsu's bed and pokes at Kasamatsu's cheek to wake him up but Kasamatsu just groaned when he felt someone poking his cheeks. Kuroko sighed and kisses Kasamatsu's cheeks.

"Please wake up, Kasamatsu-san." Kuroko called, monotonously but Kasamatsu groaned before facing his body to Kuroko's direction.

Kuroko looked at the clock before sighing. "Kasamatsu-san, it's already late so I really need go ho–!"

Kuroko gasped when Kasamatsu grabbed his arm, pulling him on top of his body then Kuroko's body fall on top of Kasamatsu with his head on Kasamatsu's chest. Kuroko tilted his head up to look at Kasamatsu when he felt a pair of arms wrapped around his body.

"Please let go of me, Kasamatsu-san. I'll miss the bus if I don't go now." Kuroko said with his deadpanned face.

"Just a little bit more. Stay with me like this." Kasamatsu said, without opening his eyes.

Kuroko almost pouted at what he heard. "But–"

"If you call me by my first name, maybe I'll change my mind." Kasamatsu seriously looked straight at Kuroko's eyes.

Kuroko's eyes widened before hiding his head against Kasamatsu's chest. Kasamatsu raised a brow when saw Kuroko's ears getting red. He sat up on his bed, wrapping his legs around Kuroko then he cupped Kuroko's face, looking at his expression. Kasamatsu saw Kuroko's hiding his face using his bangs but what shocked his most is when he found Kuroko's blushing up to his ears. His face is so red up to his ears. Kasamatsu immediately blushed at what he saw before hugging Kuroko, close to his chest.

"I-I changed my mind. I-I won't allow you to leave." Kasamatsu said, still blushing.

Kuroko's eyes widened as he felt his cheeks blushed. "P-Please let me go, Ka... Y-Y-Yu... Y-Y-Yu..."

"Huh? Kuroko-kun?" Kasamatsu looked at Kuroko with a raised brow and saw him, trying hard to get the word out of his mouth.

"P-Please let go of me... Y-Y-Yu... kio... san..."

Kasamatsu stared at Kuroko, shocked as he register in his mind what Kuroko just said. "D-Did you just call me... Yukio-san?"

But instead of replying, Kuroko just hid his face behind his bangs to hide his blushing face. After some minutes of silence, Kasamatsu smiled and pulled Kuroko close to his chest, kissing the top of his head.

"I love you, Kuroko-kun or should I say Tetsuya-kun?" Kasamatsu asked, kissing Kuroko on his cheek which's still blushing furiously.

Kasamatsu looked at Kuroko and saw him, also staring at his face. He smiled brightly before kissing Kuroko full on his lips with his eyes slightly close, staring at Kuroko's expression. He saw how Kuroko closed his eyes and melted onto the kiss. Kasamatsu completely closed his eyes as he kisses Kuroko, sighing contentedly.

(OMAKE)

At the nth time, Kasamatsu Yukio sighed contentedly as he watched all of his teams who're busy practicing. Kise suspiciously looked at him, completely bothered at Kasamatsu's mood swings(1). Who wouldn't be? One day, he looks troubled then the next day, he looks contented. Right?

"Nee, Moriyama-senpai. What's wrong with Kasamatsu-senpai? He's been grinning a lot and it really bothers me-ssu." Kise asked Moriyama who's busy practicing his shots as he looks at Kasamatsu's direction, suspiciously.

"Maybe it's about his girlfriend." Moriyama sighed, shaking his head. "How lucky~ I wish I could also have a girlfriend ~"

Kise tilted his head at what his senpai just said. As the team were having a break, he decided to just asked Kasamatsu directly.

"Nee, Kasamatsu-senpai~"

Kasamatsu looked at Kise, wondering. "What is it?"

"You've been grinning a lot lately-ssu. Could it be because of your girlfriend?" Kise teased, grinning.

Kasamatsu paled at what Kise just asked and decided to just hide it. "W-What are you talking about?"

"Ehh? Moriyama-senpai heard that you've been going out with someone. Do I know her-ssu? Senpai?" Kise asked, completely interested.

"It's none of your business." Kasamatsu sighed. "Just tell everyone to go back to practice."

Kise raised a brow at Kasamatsu but decided to just let him. He just doesn't want to provoke his captain anymore.

"Hai-ssu" Kise shrugged before he decided to go back to his teammates.

Kasamatsu sighed in relief. He doesn't want Kise to know that he's dating his precious Kurokocchi. After all, we all know how much Kise's obsessed with Kuroko. Kasamatsu's eyes widened when he suddenly heard Kise shouted.

"K-Kurokocchi?!"

Kasamatsu immediately turned his head towards the door, looking at the commotion and saw his light blue haired boyfriend being suffocated with Kise's death hugs.

Kise released Kuroko and looked straight at him. "What are you doing here, Kurokocchi?! Don't tell me you miss me-ssu?!"

"Of course not, Kise-kun. Please stop joking." Kuroko said, seriously.

"That's so mean-ssu, Kurokocchi!" Kise whined.

Kuroko looked around the court and slightly smiled when he saw who's he looking for. He immediately run towards Kasamatsu's direction.

"What are you doing here, Kuroko-kun?" Kasamatsu asked, smiling and he raised a brow at Kuroko when he took a piece of paper in his bag then gave it to him.

Kasamatsu took the paper in Kuroko's hand then looked at it. His eyes widened when he saw that Kuroko got 75%(2) on their Math Test. He unconsciously patted Kuroko on his head, smiling widely.

"Good job, Kuroko-kun."

Kuroko blushed at what Kasamatsu did. "T-Thank you, Kasamatsu-san."

"That's not fair, Kurokocchi!" Kise whined, hugging Kuroko.

Kuroko looked at the blonde, confused. "Huh? What's not fair, Kise-kun?"

"You allowed Kasamatsu-senpai to touch you-ssu. But when it comes to me, you're always too cruel-ssu. Why is that, Kurokocchi?!" Kise cried, almost whining.

Kuroko sighed then looked at Kise, seriously. "Of course, I'll let Kasamatsu-san touch me. That's because we're dating."

All of the Kaijo basketball team members stopped at what they heard from the light blue haired phantom of Seirin as they looked back and forth from Kasamatsu who's clearly blushing then to Kuroko who's still wearing his stoic mask before they all shouted...

"EHHHHHH?!"

A/N: I guess it's boring, short and I made Kasamatsu sooo~ OOC here. I'm so sorry about that. What can I do?! It's really hard to make this kind of fanfic since I haven't saw even one Kasamatsu x Kuroko fanfic. I found one but Kasamatsu became Kuroko's brother so it's really not considered as Kasamatsu x Kuroko so... Yeah. I'll dedicate this chapter to 'Kai Chen'. Sorry if it's boring. I also am really sorry if I took some time to update and this is the only one I can came up with. I'm so so sorry about that.

(1) I don't know how to call it. I can't really came up with a word to describe Kasamatsu's situation so I called it 'mood swings' XDD

(2) I didn't know how the score system works in Japan and I know Kuroko always have average scores so I don't know if the score I gave him was too high or too low.