Eris Violet is the kingdom's strongest hero, renowned for her sword skills and unwavering dedication to exterminating demons. However, after a solo mission goes wrong, she falls prey to the ambitious Minister Kiryuu Tanatsuki. Through psychological manipulation and the use of a potent drug, Kiryuu breaks Eris's spirit and pride, coercing the once-proud heroine into a life of sexual servitude under the guise of national research.
Eris Violet, the kingdom's strongest hero, struggles with an insatiable lust caused by a demonic body alteration. While secretly serving the corrupt Minister Kiryuu, she is forced to "train" her admiring junior, Keith, in a series of depraved acts. Overwhelmed by her new desires and Kiryuu's manipulation, Eris completely abandons her heroic pride and pledges herself as the Minister's exclusive plaything.
Eris's degradation deepens as she uses her altered body to "train" her junior, Keith, through sexual submission. Her humiliation reaches a peak when Kiryuu forces her to perform as a "living bingo machine" and a "garbage can" during a public event, ultimately stripping her of her remaining dignity in a live sex show.
Eris returns to her hometown, but the once-proud Blazing Flame Heroine has devolved into a degraded shell of her former self. While enduring further humiliation from Keith and others, a sudden conflict reignites a flicker of her heroic spirit. However, the corrupt Minister Kiryuu soon arrives to reclaim her, using a potent drug to push her body to its limits before declaring her "vacation" over.