Princess Yurie of Asronia, a kingdom on the continent of Laan, holds royal status though her specific family or political role remains undefined. While journeying to celebrations honoring the 30-year reign of Gostaria's king, her procession is ambushed by forces under the Demon Dragon King. This assault leads to Yurie's capture and transport to the antagonist's stronghold. Her personal bodyguard, Maya, survives the attack and launches a mission to rescue her.

Imprisoned within the Demon Dragon King's domain, Yurie endures systematic torment aimed at shattering her will. The antagonist's goal is to transform her into a compliant pleasure slave within his collection, subjecting her to prolonged psychological and sexual coercion termed "training." This incorporates ritualized humiliation and eroticized torture, though explicit physical details are obscured.

Yurie's captivity provides the driving consequence for Maya's quest, creating parallel storylines between captive and rescuer. Her circumstances depict profound vulnerability under enforced subjugation, though her psychological responses—whether resistance, adaptation, or deterioration—receive minimal elaboration. An unresolved narrative arc, due to the absence of intended sequels, leaves her ultimate fate undetermined.

Another captive, Denise from Asronia Castle, shares similar status under the Demon Dragon King's control, though direct interaction between Yurie and Denise remains undocumented. Details of the princess's life prior to abduction—including personal relationships, skills, or political significance beyond her royal identity—lack substantive development across available media.