Undertown

あらすじ

Sama, a 10-year-old boy, is deeply saddened by his father's critical condition after a heart attack, with doctors giving him only a month to live. While clutching his teddy bear, Sama discovers a magical portal beneath his bed that leads to a peculiar realm known as Undertown. He embarks on a journey through this dark new world, seeking a magical artifact called The Sugar Stone, which he believes can save his father's life.