Zettai Shinanai Stella-hime

After losing her father, the king of Hillvalley, Princess Stella is thrown into the middle of a succession crisis. Her stepsister Illusia wastes no time in trying to assassinate Stella and seize the throne, but all her attempts mysteriously go awry. Little does anyone know that the young princess has a hidden protector…in the most unlikely of places!

(Source: Kodansha USA)