Spiritpact, also known as Soul Contract, is an online Chinese manhua written and illustrated by Pingzi. It is published by Tencent Holdings in its magazine Tencent Comic. An adaptation to series of anime written by Reiko Torii and directed by Li Haolin was released in China the 21 of June of 2016, and consists of twenty episodes. A Japanese dub of the series was produced by Emon and issued on January 7, 2017.
The opening theme song of the animated series is "MUGENDAI" by Yu Jiaoyan and the ending song is "Endless Stories" by RiyO.