Disclaimer: I don't own Naruto

Prompt: Eternity

Note: Written for Narusaku week theme, "In Another Life" I want to write a multi chapter fic SOON.

Eternity – a time without an end; a state that comes after death and never ends; a time that seems to be without an end

Kakashi paused from his lecture to look at his students. Majority of the class exhibited interest, making him smile contentedly beneath his mask.

He stepped to the center, just in front of the teacher's table, and continued. "So Ashura and Indra fought but they were evenly matched. Eventually, they reconciled. However, Indra left their original realm to establish his own group and Ashura married a goddess he met a few years before the war."

He halted when he saw a student raise a hand. "Ah yes Naruto, any questions? Or would you like to add something?"

"Sensei, Ashura married a half-goddess and half-human didn't he?" Some classmates turned to look at him, including Sakura who sits directly in front of him in class. It came as a surprise for the blond rarely participates in class discussions.

"All Mythology books state that Ashura's wife is a goddess." Kakashi answered before proceeding with the rest of the lesson. Naruto looked dissatisfied but he let the matter go. After a few minutes, the bell rang and Kakashi bid them goodbye.

The other students rushed outside after fixing their things. Naruto saw Sakura placed her books into her bag before she turned to him. "You looked disappointed during discussion. Are you not feeling well? Should we cancel our date later?" she asked worriedly.

"Of course not Sakura-chan! Don't worry I'm all right!" he said, flashing his trademark grin with a thumbs-up and Sakura found his enthusiasm contagious.

"Naruto could we talk?" Sai, their classmate approached the two but only looked pointedly at the blond.

Naruto seemed to understand the unspoken message. "Sakura-chan, I really need to talk to Sai. Is it all right if you wait outside? I promise this wouldn't take long,"

Sakura looked at Sai curiously before picking up her bag and leaving the classroom. Sai had looked at her retreating form and made sure she was already outside and out of earshot before he spoke.

"Are you sure about this? I'm not against the two of you but I've seen this happen thrice in my lifetime and it's always the same. You wait for a hundred years. You meet her, you fall in love then she dies each time. Aren't you getting tired?"

Sai was right. Naruto first met her 400 years ago. Back then, he was called Ashura and Sakura was that half-goddess and half-human who found him almost dead near the battlefield where he and his brother Indra fought Madara. Through her healing powers, he was saved from the brink of disappearance.

They had fallen in love. Unfortunately, her life didn't last long. When unknown forces wreaked havoc and tried to kill him with that special weapon used to kill immortals, Sakura had stepped forward and used her own body to shield him from harm. It was the first time he saw her die and that was the start of the cycle.

He was a hollow shell after her death and he had waited a hundred years to see her again. She was a princess in her second life and a ninja in the next. She has no memories of her past lives but even then, he still appears to her every time and she would also fall for him each time. The only problem was, everytime they meet, he was always left alone for a god like him never dies expect for special circumstances.

"Naruto, are you listening?" Sai's voice brought him back to the present.

Naruto stood and got his bag. Then, he gave him a serious look.

"I will wait again and again because she is worth it," It was short but full of conviction. It implied that his love was in its purest form-selfless but aggressive, steady and forever unchanging. He went to the door and Sai could only watch as he talked to Sakura outside with that tender expression he only reserves for her. Even after a hundred years, it was still the same.

Naruto knows there will come a time when she would leave him again. Death was a bitch and it was just out there, waiting for that right moment when it would once again become that impenetrable barrier to separate them.

When that happens, he will wait again.