My Grandma Is the Best Actress, Now the Whole Hell Calls Me Grandpa

The protagonist Xiao Ling is forced to get entangled with Bai Xier, a paper bride of unknown origin. He investigated his grandma's past and discovered that she made a deal with an unknown entity in order to keep the father of Xiaoling in her belly. The relics left by his grandmother guided him to find three "play keepers" and learn the lost methods of "crying for mourning" and "happy singing".