Saya Niiyama works as a hotel room attendant. After helping Takashi, the wealthy heir of a major corporation, during her shift, he becomes infatuated with her and eventually promises marriage. However, Eri, a high-society lady secretly in love with Takashi, grows consumed by jealousy and hires the Mochizuki syndicate to kidnap Saya, ordering her to undergo brutal training and humiliation. The story unfolds at the intersection of love, revenge, and unyielding willpower.