Popolocrois Monogatari

These 2 titles take place in fantasy worlds, and have child main characters who go on a rampage when confronted with unfamiliar feelings like envy and jealousy. But their characters are rather different. Prince Bright in the "Twin Princesses" starts as a nice guy, but when given powers, the dark feelings in him gain the upper hand, and make him a villain. He acts calm and calculating when he does the bad thing. Hyuu in "Popolocrois Story" is not so nice to begin with, and she already has powers, but gets catapulted into another world and situations she is not accustomed to. When she follows her feelings that dwell up in her, she acts rather erratic. I would recommend these titles as studies of child characters in fantasy worlds who deal with the evil inside them.&nbspread more 

It's pretty similar, especially DAT design.