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After having Ren get his tattoos, Kakashi suddenly felt that calling him 'Kakashi-san' was... lonely. Sure, the man was happy to have Ren call him by his first name but somehow, he feels like it wasn't enough. Kakashi wanted something more endearing, something only Ren can call him.

With these thoughts in mind, Kakashi practically spoiled the young boy. He bought him anything he wanted and frankly, it wasn't much. Kakashi wonders if he was doing something wrong in taking care of his precious little Ren.

Nohara Ren was the light he didn't want to dimnish, to suddenly disappear from his life.

So he thought, if the two of them are going to live together for as long as they live, Kakashi wanted Ren to call him 'father' or anything synonymous of the word.

"Kakashi-san, I'm finish washing the dishes."

"Can you please give me more advice how I can avoid fangirls, Kakashi-san?"

"I live with Kakashi-san so no Naru-chan, I can't live in your apartment."

It was always Kakashi-san this and Kakashi-san that. It grates on his nerves. Hearing people, especially Ren, call him that nowadays just annoys the heck outta him. Like he said, he wanted something more endearing, something only Ren is allowed to call him, something special to the both of them.

"Good morning, Ren-chan~"

"A pleasant morning too, Kakashi-san."

His eye had twitched uncontrollably in irritation. No, it wasn't the cause of dust. It's the effect of being called 'Kakashi-san' on him. One way or another, he'll find a way to make Ren call him 'father' or anything synonymous. And...

... he found himself sulking in front of the Hokage. The famous Copycat Ninja, a shinobi who's famous across the nation, is sulking like a five year old kid in front of the Hokage, who could only give the man a pat on the back.

"What is the matter, Kakashi-kun?" His wise old voice somehow soothed him but was not enough to get him out of his 'Sulking Mode'. "My little Ren-chan won't call me 'father' or something cute like 'daddy'." He finally said it to someone else.

The Hokage shook his head and felt pity for him. He was only turning nineteen this year and he was already feeling like an official parent, more like a single father. Kakashi really is... weird. "You do not need to rush the boy, Kakashi-kun. Ren-kun will call you father in his own pace."

Kakashi gave him a desperate look. As if he's going to wait for years until Ren decides to call him that! "I apologize if I can't give you anymore advice because as a father, my son automatically calls me that." The soon-to-be nineteen year old slumped over his seat. Kakashi heard stifled laughter.

He glared at the ANBU hiding in the shadows. Did he think his pain and suffering is funny? The ANBU quickly shut its mouth up and stayed silent. "Thanks, Hokage-sama." And then, Kakashi left.

He had taken his time to walk back home. He decided to slowly look around and appreciate his village. But the scene quickly turned depressing when he saw little children calling for their parents. Kakashi's thoughts suddenly wandered back to his precious little Ren.

What will it take him to call Kakashi 'father' or the like?

Hmmm, I have no idea how to do it. I don't want to force Ren to call me 'father' or something. I want him to call me that on his own, but then, it'll take him months or maybe years before he calls me that. Ugh~ I've never felt so frustrated by something so trivial. Then again, this issue doesn't look like trivial to me.He massaged both of his temple before an idea hits him.

His lone onyx eyes widened. That's it! Kakashi quickly shunshined back to the house, he knew Ren is already there anyways. He found the young boy sprawled out on their couch reading a medical book. Apparently, and not so surprising, he took interest in the medical field.

Hazel eyes looked up from what he's reading to look at him and sent him a smile. "Welcome back, Kakashi-san." His lone onyx eye involuntarily twitched before relaxing and kneeling down in front of Ren. "Ren, listen carefully."

"Hai?"

"Do you wish to take on my last name?" Ugh, why was he so formal all of a sudden?!

"Eh?"

Kakashi flushed a bit, he knew he was embarrassing himself by saying what he's going to say next to Ren. So what? He's gonna man up and tell the boy what's troubling him since this morning.

"You see... I'm glad you're not calling me Hatake-san anymore but calling me Kakashi-san now feels kind of—"

"—d-do you hate me?" Wah! Kakashi panicked when Ren's eyes teared up. This was not part of the plan! THIS WAS NOT PART OF THE PLAN! "N-No! It's nothing like that, Ren-chan."

"Th-Then, Wh-What?" God, he feels like a douche now for making him tear up. But he also looks adorable with glassy eyes.

"I... I don't want to force you or anything and I would gladly let you have your time but it just feels wrong how you call me Kakashi-san and... um, please don't cry!" he exclaimed the last part when he saw that Ren was about to cry again.

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Ren doesn't know why he's so emotional today or why he's acting like a child when he's spiritually almost Kakashi's age.

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"I... do you think you can take up my last name? Well, I mean, do you want to? So, you know, we can get rid of this formality between us and um, so... you can call me father or something... ugh, I'm so lame, aren't I?"

Oh, how the mighty has fallen.

"... I don't see why not, Kakashi-oyaji."

Kakashi freaking did a flip five times in a row around their living room when Ren called him 'oyaji' and cooed on Ren's blushing face.

He scooped up the boy in his arms and gave him kisses all over his face.

"Ew! Stop it!"

Nah, he wants to cherish these kind of moments for as long as he could. Because the ninja world isn't so kind to children, after all.

Though, it was worth. Because if Kakashi hadn't been a ninja, and hadn't have a steady income, he wouldn't have met Ren and he wouldn't have been able to adopt him.

So yes, being a ninja is worth it.