Indenture

"Celestia." The voice of a familiar creature reached her human ears.

Her gaze trailed up to meet her masters pair and this initiated his anger but she remained emotionless as he began to complain.

"What the hell was that just now? I've been training you for the last ten years and I don't remember you fighting with the speed of a snail. I wouldn't have been surprised if these weak demons killed you."

The straight black strands of Celestia's silky hair sway slightly under her hood as she stepped off the pile of dead bodies. The sharp weapon she summoned earlier transformed into light, allowing itself to be absorbed by the tattoo on the palm of her hand. The male glared as she disregarded his last words and spun on her heels, intending to leave the sickening scene.

"How many times have I told you to not act like that towards me?" His form materialised in front of her, this allowing his long fingers to wrap around her neck.

Celestia choked as her body was driven back and smacked against one of the trees in the vast forest. He released her once her face grew pale and watched smugly as she coughed and desperately inhaled as much as oxygen as she could. She bowed stiffly towards her master as soon as she managed to sort herself out.

"I apologize, Zerro."

His lips formed into a cruel grin and he unexpectedly planted a kick in her stomach causing Celestia to hit against the rough bark a second time.

"You are just a weapon...nothing else."

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During a majority of her life, Celestia suffered through misfortune after misfortune, thanks to the demon, Zerro, who tricked her into creating a contract with him. When Han, a new student transfers to her school, he makes it his mission to help lift away her suffering. Will he succeed or will Zerro stop him from doing so?