Title: In Their Blood

Rating: T

Genre: Romance / Angst

Beta read by: Tuvstarr's Lost Heart

A/N: Happens a few months after Boruto and Sarada first meet, back when they're physically around six to eight-years-old.

The moon hung low and large, and stars filled the skies. The wind was strong enough to make the flowers bend and the trees sigh as it combed through the leaves.

He took a deep breath and forced a smile when his son looked back at him. Wider. He had to smile wider. Naruto's eyes closed for a moment before he gave Boruto a thumb's up.

Boruto grinned back and ran towards the middle of the clearing where a little girl with black hair and eyes as dark as the night were waiting for him. In the little boy's excitement his wolf ears popped up, and so did his tail. The little girl's eyes lit up at the sight and she laughed. He chased her around the field.

For a normal human, the speed that the two children were running it would have been too fast for their eyes to keep up. The couple would have seemed like a trick of the light, nothing but their imagination playing tricks.

These two children were not normal humans, and Naruto was nowhere near normal himself.

"Teme." He shook his head slowly, but never removed his gaze from his son. "We have to do something about this."

Out of the shadows, a tall man wearing a dark coat stalked into the moonlight. His pale and beautiful face coming into view as he moved closer. His hair and eyes were also as dark as the night. He said nothing. He only watched the little girl running around the field.

"There's nothing you and I can do, Naruto."

Naruto gritted his teeth and clenched his fists. "There has to be something. Anything."

Sasuke's gaze moved to the little boy. "He's heeding the call of his blood."

Turning around quickly, Naruto glared at his friend. "Things are different now, Sasuke. There's no need for Boruto to be hers. It's too dangerous for him."

"It is a Wolf's honor and purpose to serve." Sasuke's brows furrowed. "And Sarada will be his, as much as he is hers." He swallowed thickly before continuing, "you think that doesn't mean she won't be in danger also?"

His blood started to boil, and blue eyes slowly turned red, black pupils turning into slits. Naruto could not lose his son to their kind. He refused to lose any more of his family to a tradition that was unnecessary and unjust.

Despite taking his family away from the mess, The Society always found a way to find them. For his son to serve the heir, to be bound by her... "I will not allow it."

"That's not your choice. As I said, it's in his blood." Sasuke stared into Naruto's red eyes. He looked so calm, and yet Naruto could hear his heart beat faster as well.

"Papa?"

Naruto froze and broke contact with his friend as Sasuke's daughter approached them. Sasuke scooped her into his arms as she wrapped her arms around his neck.

Boruto tugged at his cloak. His voice getting smaller with each word slipping passed his lips. "Dad, you okay? I felt your killing intent."

Naruto closed his eyes for a while and willed his temper to ease. Sasuke was right. It really wasn't his choice to make. It was Boruto's. Even if he was too young to understand his own decision, Naruto already knew who his son would choose.

"Your uncle Sasuke here was being a jerk, ya know?" he joked.

Boruto laughed, Sasuke rolled his eyes, and Sarada giggled.

Naruto looked at Sarada with a pained smile. This little girl was going to own his son's heart. She didn't even know it yet, but Naruto was certain she would find out before Boruto would.

Sarada looked at him too and gave him a warm smile.

How could he detest her? She was so innocent...

"Dad, can I play with Sarada more?" Boruto tugged insistently on the edge of his cloak. "It's still early. The sun doesn't rise for another two hours."

Sarada looked at her papa with pleading eyes. Sasuke looked at Naruto before putting his daughter down on the grass. "As long as you don't hurt him too much," he smirked.

She gasped. "Papa! I would never!"

Naruto looked away. He felt it—her sincerity—she never would, not on purpose.

Boruto blinked a few times before coming closer to her. "I promise I won't hurt you, too."

They were bound to each other. Without even knowing, their blood had been calling out to each other. And now that they were together, no force, supernatural or not, could separate them.

The two children ran back towards the field, leaving Naruto and Sasuke together by the trees yet again. A strong breeze blew by, picking up the ends of their coats and making their hair dance in the wind. They watched the two of them play in silence for a while.

"They promised..." Naruto looked longingly at the two kids.

Sasuke nodded. "They will never forget that."

"Neither will I."

A/N: Gives a very light taste of what happened centuries back, as well as the old and current dynamic Vampires and Werewolves have. Wrote this on the plane going home from a trip. Big thank you to Tuvstarr for beta-reading for me!

Do leave me a review and hit me with your best guess what happened back then and I may just give you a hint! ;)

Have a great week ahead, darling.