Return Before Her Death

"Contract signed." When he woke up again, he was lying in a strange place called the Spirit Power World, with a girl named "Xiao Yue" who claimed to be his contracted spirit by his side. She told him: the him in that world was dead, but he was alive in another way. Ye Fan didn't want to live; he wanted to go back. Go back to take revenge, go back to save someone. — Description from novelcodex.org