やんちゃ姫さまの大冒険 うちの第三王女、冒険者になるってよ

"The Princess Who Became an Adventurer at Age 7" After her engagement is annulled, 7-year-old Princess Pasian declares, "I’m going to become an adventurer!" much to the bewilderment of her loyal knight, Arjan. Undeterred by his concerns, Pasian sneaks out with a magical artifact left behind by her heroic ancestor and embarks on an adventure with Arjan as her only companion! A whimsical adventure fantasy featuring a mischievous princess with the blood of a hero and her former-adventurer knight guardian!