As much as the children love her, she is not their mother. Although they live together, they are not related either. Grace Field House is where children without parents are taken in. An irreplaceable home for the 38 children that all live happily every day, even if they were strangers at first. However, the happy days at Grace Field House ended abruptly. In truth, their home is a farm, and the children are just human meat, food for the demons. Meanwhile, the Mum they love is a watchdog.