Ryo and Charles

The story revolves around two half sisters that share the same father but different mothers. Ryo "Ryoko "Hirano is the main character. She lived the life of a delinquent. In her pastime, she reads a book that her mother gave her as a child. She realized the stories were real.
Now she lives with her father, Henry. Who wants to make up for lost time during Ryo's childhood. Amber-Rose "Charles" Bryant is the deuteragonist. She may be shy. Other times, she could be a little blunt.
When you put these two together, you will experience a grand adventure.