The stars are for you [Honkai:Star rail fanfiction]

The dusted star, Cerberus

A young man with short dark opened his eyes, revealing a beautiful pair of obsidian orbs glittered with amber and light green dust resembling a starry night star. Dark hair danced playfully as the young man stumbled from his seat, a throne of amber and stone that was worn and torn. 

"I can never go back," the young man lamented as he looked at the image in front of him. Time flowed for everyone but him and once more, he was left behind. 

A pair of bright lights erupted from the young man's chest, causing blood to flow from his eyes and elbows. A soft amber glow produced a rook chess piece that glowed with primordial power while the soft green light produced a circular crystal that shattered, losing its luster. 

"AAAAAAAAAHHHHHHHHHHHHHH!" 

[Your body submits] The voice that haunted him for so long echoed in his mind.

The young man's obsidian eyes snapped open

[Your heart succumbs,] The voice echoed out once more 

Through sheer force of will, the young man forced himself to stand up

[So why does your mind resist?] The voice echoed, its hostility long gone only replaced by curiosity.

'I don't know...' The young man thought as he used his numb hands, crawling back to where his throne was. 'But.' Images of an energetic young woman appeared in his mind followed by two people, his brothers. 

[It has been a long time, they have all moved on while you alone remained unravaged by time,] The voice echoed out. 

Pushing himself and positioning himself on his throne, the young man's tired obsidian eyes no longer had the star-like mist that covered them. Closing his eyes, the young man opened them once more.

"I can't go back..." the young man whispered tiredly as he saw it. His whole life remained untouched for the last decade and yet his family and friends lived theirs. 'But I won't give up...' 

Very well.

 He was no longer on his sealed throne. 

The young man looked around as he saw himself in front of a mirror, a reflection of himself. 

Dressed in a black suit with golden accessories and pants with a gray shirt and black stripes, the young man loosened the red tie around his neck and unbuttoned the top part of his collar. 

"Where am I?"

 I am Akavili, Aeon of the Trailblazers. Former Joyful Lord of the earth

Hearing the title he used to have, Rex tensed as he focused his powers before frowning as he only formed a brittle replica of his spear. 

Be not afraid, I am here to offer you a contract

Hearing the word contract, the young man raised his brow as he let his hair run free, reaching his shoulders. 

"What contract?" The former joyful lord of the Earth asked as he lowered his spear. 

I want you to travel with the Nameless.

"Nameless?" 

My followers, rather the followers of myself from another reality. 

"I'll bite. What do you need me to do?" 

I want you to live. 

"Pardon me?" The young man asked, his amber spear 

You have sacrificed your power, your entire being to the unknown, cutting your life short. Even now, your body and heart succumb with your mind only surviving through your will.