The beautiful heiress Kurenai Mitanosuke, who prefers to dress as a samurai and is known as the Crimson Princess, finds her life threatened by the will and ambition of Tokugawa Tsunai and his henchmen. While embarking on a long journey to hone her swordsmanship, she is accompanied by her two bodyguards, Kaki and Suki. These lustful men, however, are less concerned with external threats and more focused on secretly coveting their employer due to her well-shaped bust. As Mitanosuke travels to train, her family's enemies learn of her adventure and dispatch assassins to kill the surprisingly strong young woman. Unbeknownst to her, her life is also secretly protected by a mysterious one-eyed shinobi, adding another layer to the perilous journey. The single-episode OVA, set in a historical Japanese context, follows this clash between the heiress's determined quest for self-improvement and the schemes of those who wish her dead, all while her own guardians are distracted by their base desires.