Hello minna~! I am so attracted to Yokozawa x Kirishima that I had to write a FF about them! Well, the inspiration just pop into my mind, so there you go! This is my first time writing for Sekai Ichi Hatsukoi, this couple and a M rated FF so pardon me if I've disappointed you! Pardon me for grammar errors too. R&R are welcome. :)

A special thanks to my friend who vet through the story and gave me feedbacks for improvement before I uploaded it. :)

Disclaimer: All characters belongs to Nakamura Shungiku! I don't own them! If they are mine, Yokozawa Takafumi and Kirishima Zen will be down into the manga! .

Enjoy!

"Two adults' and two children's' tickets please." A brown-haired man in his mid-thirties positioned his body perpendicularly facing the counter, a wide friendly smile hung on his face as he spoke, dazzling the young receptionist last at the counter.

The atmosphere turned flowery immediately as the receptionist blushed, completely dazed by the friendly, fair and good-looking customer in front.

"Ahem." Beside him, a black raven haired man, in his late twenties, wearing a grey plain casual long sleeves shirt let out a cough, breaking the flirtatious atmosphere in front of his eyes.

"O-oh! Your tickets, here you go, sorry for the wait!" The woman fluttered, and quickly handed the tickets out.

With a stern looking face, the man in grey took the tickets while the brown-haired man reached into his pocket to retrieve his wallet.

The raven haired man walked away, his facial expression softened as when he bent down to pass the tickets to the two waiting elementary students. "Here are your tickets. Be careful not to lose them."

The eleven years old girl in a bright pink hoody reached out for the tickets happily. "Yay! Thank you Onii-chan! Let's go in, Yuki-chan!" She grabbed the same aged Yuki and ran beyond the entrance of the theme park.

"Don't run too fast, Hiyori." A paternal voice called out from behind.

"You're slow." Commented the grey shirted man, when he heard the footsteps stopped. A figure appeared beside him.

"Oh? I didn't know you are waiting for me." Upon hearing this, the man chuckled, answering. "What's with the face? Are you jealous that I looked kind of flirting with the young woman at the counter? My, Yokozawa's so adorable!" The brown-haired man glanced at the other, saying with a suggestive look on his face.

"Who is -!" Yokozawa Takafumi flared, raising his voice for a second, quieting when he realized that he was drawing attention to themselves. He gritted his teeth and tched before shutting his eyes, tearing his gaze away from the brown-haired man who had a playful and anticipating expression spread on his face. If he could slaughter someone with just simply a glare, Kirishima Zen would have been dead a hundred times over.

"Get your ass moving," Yokozawa heaved, putting his hands in his pocket as he walk, entering the theme park. "Hiyo has already gone in."

He stared at the big 'Welcome to XXX Theme Park' signage, and his mind began to wonder off, processing the whole reason why he was here at the theme park on his day off.

Yesterday night on the journey home -

As he walked, Kirishima suddenly remembered something he kept forgetting to inform his partner.

"Keep tomorrow free, Yokozawa."

"Hmn?" Yokozawa lifted his head up, his curious grey eyes stared into Kirishima Zen's brown eyes.

"I am bringing Hiyo and her friend, Yuki, to the theme park tomorrow. Hiyo asked for you to tag along too." Kirishima stated. "Well, I intended to bring you together with me anyway…" His voice trailed off at the last sentence.

"Ma, I have nothing on tomorrow…" Yokozawa replied with a flat tone, his mouth twitched at the latter comment. "And just what's with the 'intended to bring you together with me anyway?' Don't make it sound as if I am your property!"

"I didn't? Besides…" Kirishima leered, tucking his index finger under Yokozawa's chin, leaning nearer until their noses were only an inch apart, staring into a pair of black iris with a playful smirk on his face. "Aren't you already mine?"

Yokozawa glared back at the hazel brown eyes in surprise. The sudden closing distance between them made his heart skipped a beat. He could feel the sides of his face getting warmer. The look in Kirishima's eyes, it's clearly indicated that he was teasing him. "Fuck off!" He snarled, smacking away his arm forcefully.

That possessive statement… Kirishima should have already known the answer to that. Yokozawa looked away and strode forward, trying to hide his already burning red face away from Kirishima. He could hear the man laughing away behind him as he catches up with him.

"Okay, back to the topic. You're coming with us tomorrow right?" Kirishima stopped laughing and jogged forward to catch up with Yokozawa.

"Yes." Yokozawa nodded. It's been a few days since he last met Hiyori. He hadn't forgotten their promise to cook together at the next opportunity when wasn't so busy.

Kirishima Hiyori is Kirishima Zen's eleven years old only daughter. For some unknown reasons, Yokozawa and Hiyori had bonded rapidly, and he would go to Kirishima's apartment to cook with Hiyori. Her love for pets made her close to his cat, Sorata, who was currently in her care. They have been best friends with each other ever since.

"Really? It's confirmed then~! I will pick you up tomorrow morning! Oh, or come stay overnight at my house instead? We could sleep together in my room. It's so lonely sleeping alone you know…" Kirishima grumbled, complaining as he back hugged the bear-liked man in front, whispering, blowing his breath on his ear as he spoke.

"…! H-Hey, just what you think you're doing! We are still outside!" Yokozawa felt his cooled down cheeks starting to heat up again. He struggled and pushed off the pair of hands clinging on his body, reprimanding Kirishima's behavior. They are still outside, in a public area, at the most crowded period of time.

Given Kirishima's character, he could care less about the situation they were in. He isn't the type to mind other people's judgment, Yokozawa remembered, as he played the scene where Kirishima first took his kiss from him. He shook his head, trying to block himself from recalling the amazing feeling he felt when Kirishima had given him the surprise kiss.

Upon hearing what Yokozawa said, Kirishima, who was being pushed away, flickered his eyes to his lover with a suggestive look. The corner of his mouth curled up to an angle. "Oh~? That means that it's fine if we're inside?"

"…! That's not what I've meant!" Yokozawa felt irritated. Why must he always interpret things the other way round!

"What do you mean exactly, then?" Kirishima questioned, looking at Yokozawa and becoming more amused when Yokozawa could not find the words to refute. He snickered softly.

"Tsk!" Looking at Kirishima's victory smile, he cursed. The ire within him grew and he kicked Kirishima's leg in frustration before stomping off, trying to hide his red cheeks away from him. "I am heading home!"

"A penny for your thoughts?" Kirishima's face suddenly appeared in Yokozawa's field of vision, forcing his thoughts back to reality.

"Nothing in particular," he explained in a flat tone. Just then something came across his mind, and he turned to look at the adult beside. "Is there any special reasons for coming here…?" with him? He swallowed back the last two words that were about to escape his throat because he knew that they were bound to stir up trouble.

"Well…" Kirishima's gaze stayed on his face for a few seconds before they were fixed far ahead, on the cheerful active little girl in pink hoody up at the front. "Just felt like it." He replied jokingly.

"You know I won't buy that." Yokozawa glanced at him. He knew he was just fudging with his half-ass attitude.

"You really wanna know?" Kirishima's caramel colored eyes directed at Yokozawa interestingly, like a fisherman throwing his bait into the water, waiting for the prey to get hooked up the bait.

"Forget it." Upon receiving the slyly look, Yokozawa simply ignored and answered.

"… Day…" Kirishima's muttering voice entered his ears.

"What?" Yokozawa didn't really manage to catch what he had just said. He halted his steps and waited for the man to answer.

"Today's my birthday." Kirishima replied with a little hint of disappointment, looking into Yokozawa's eyes, the sly expression had already vanished from his face.

"Your what?!" Yokozawa's mind blanked for a couple of seconds. What did he just say?!

"Today is my birthday." Kirishima repeated as he observed the astonish expression Yokozawa was giving him.

"I know nothing of it! Why didn't you tell me earlier?!" Yokozawa exclaimed, his brow already knitted together. The news seems to be too hard for him to digest. He panicked, eyes fluttering and flickering in all directions.

"I did?" Kirishima reminded.

"When?!"

"Hmn…" Kirishima rubbed his fingers under the chin, recollecting their conversation about birthdays. "Come to think of it, you probably had already dozed off when I was saying it."

"That's-" Yokozawa didn't know what to say. He was completely dumbfounded right now. He came empty-handed. He didn't remember hearing Hiyori mentioning anything about Kirishima's birthday celebration either.

"Hey, Y-Yokozawa?" Kirishima's voice guided his thoughts back to reality. He patted Yokozawa's broad shoulder.

"Sorry, I… I didn't know that…" He was engulfed in guilt. Right now, he can't think of anything else other than apologizing.

"Its fine," Kirishima said as his hand reached for Yokozawa's, giving it a gentle squeeze, brushing his lips lightly against Yokozawa's hand. "You being here… It's enough already. I just want a… You know, family outing, with you and Hiyo. This is the best present for me. Come on, don't give me that look!" He nudged him.

"…"

"Dad~, Onii-chan, hurry, hurry!" Out of nowhere, Hiyori came approaching them shouting, pulling both adults and ran across to the big pink bunny mascot. "Let's take a picture together!"

"!" Yokozawa quickly retrieved his hand.

"Okay~! Let me take my camera." Kirishima fished out the camera looking as if nothing happened, and handed it to a man beside. "Would you mind helping us to take a picture?"

"S-Sure!"

"1…2…Cheese~!"

"Thank you very much!" Hiyori ran up to the man to retrieve the camera to take a look at the photo. "Papa, can I hold on to the camera?"

"Of course you may."

Just as Hiyori hung the camera around her neck excitingly, someone tugged her sleeves. She turned her head around and saw Yuki pointing at the large golden carousel up ahead. "Let's go ride that, Hiyori!" she exclaimed.

"Okay! Hiyori grinned." The two little girls ran up ahead.

They queued for half an hour for the Carousel. Yuki and Hiyori chose to sit together on the carriage, while the two adults sat on the horse in front. The whole portrait looked as if they were the prince while the girls were the princesses.

After Carousel, the two little girls spotted their next destination and went off to the Bumper Car area. A child was required to be paired with one of their parents.

"Onii-chan," Yokozawa instinctively lowered his gaze at the familiar voice.

"Can we pair up together?" Hiyori gently tugged Yokozawa's shirt, asking.

"Eh?" Yokozawa seemed surprised at her words, his face filled with curiosity. "You're not going to pair with your dad?"

Hiyori was tugging his sleeves, her hand signaling him to lower down his head.

"?" Yokozawa squatted down to be at the same eye level as her.

"Yuki-chan was a little shy towards you, so…" Hiyori scratched her head as she explained.

"Is that so?" Yokozawa's eyes landed on the little girl wearing a pink and white stripe casual shirt, who shied away, avoiding his eye contact and his behind Hiyori.

Her reactions made Yokozawa began to pause and wonder that if his facial expression really was that fierce and scared the hell out of people.

Just then, he heard an irritating laughter from behind. He narrowed his eyes. He did not need to turn to know who it was.

Eventually, Yokozawa paired with Hiyori while Kirishima paired with Yuki.

"Ahh~ if only we could be paired together~." A hand came and wrapped itself around Yokozawa's neck, Kirishima whined, grimacing. "We could be so lovely dovely hugging each other in that squeeze bumper car."

"Wha-!" Yokozawa's eyes flung wide open, shrugging the hand away, shouting. "Don't be ridiculous!"

He immediately regretted when the corner of his eyes saw a small figure trembled. Yuki-chan was looking at him from behind Hiyori with fear etched on her face.

"Yokozawa's scary~!"

"Papa, don't bully Onii-chan!" Hiyori stood in front of Yokozawa as if she was protecting him. "Onii-chan, let's win papa in bumper car!"

"S-Sure!"

"Since when you two are so close! I am so~ jealous!" Kirishima sulked at Hiyori, who was hugging Yokozawa's waist, and gave him a meaningful look.

"Ah, it's our turn already! Let's go!"