Saidō Curse

The Saido Curse (才堂 呪い Saido Curse) also the Maxwell Curse, is a curse in Clock Tower Ghost Head. They say it is contained within the Sadio family. One of the examples what could be the curse any one in the family cannot get rid of their child even if they wanted to. Example, due to Sho's spirit in Yu's body. It is possible if both dies without the other one living go away. It remains unknown if the Saido Curse really exist or not.

According to the Saido legend, it is believed that the "Cursed Children"—twin girls—would be born into the Maxwell family every few generations. Once they were born, out of fear of their curse, they were to be buried alive within the Maxwell tree that resides in a graveyard.