The Chou Family's Secret?

The Chou Family's Secret?

Available on Prime Video, Crunchyroll
S1 E1: The grave of a man named Chou Shakurin has been disturbed in the Chinese countryside. A girl named Houhou, claiming to be the granddaughter of the grave's occupant, appears there. At the same time, Chou Soran, a student at a college in the city, has returned to the countryside to visit his grandfather Shakurin's grave.