

Lena Hart, a top student in the law school, was forcibly sent to the underground club SIN by her creditors to settle her father's debt to loan sharks. On her very first night on stage, she was publicly auctioned off like a commodity and, teetering on the edge of humiliation and violence, was about to be taken away by a sleazy tycoon. Just as she was on the verge of a complete breakdown, Valentina De Luca, the queen of the underground underworld, suddenly appeared. She forcibly interrupted the transaction in front of everyone, took Lena away, and declared her to be her property. Lena was taken to Valentina's private penthouse, where she was presented with a slave-like contract stipulating that "the term of service shall be determined unilaterally by Party A." She refused to sign and left, but her creditors immediately sent her a video showing her parents being held hostage. With no way out, Lena was forced to return and sign the contract, thereby becoming Valentina's personal property. Attending her first underground dinner party as "Valentina's woman," she faced malicious testing from Valentina's nominal husband, Rocco, and jealous surveillance from Mia. In the darkness of a stuck elevator, the two shared their first aggressive kiss. Later, Lena tried to secretly contact her family but was caught by Valentina, who revoked all her privileges, placing her under complete house arrest. Meanwhile, a mysterious force threatened Lena via video to steal evidence of Valentina's crimes. Lena's attempt failed, and their relationship was completely shattered.

Joseph, heir of a top-tier family, is forced by his grandfather—who threatens to kill himself—to agree to marry the eldest daughter of the Smith family. But Joseph refuses to marry a stranger. Determined to choose for himself, he changes his name, goes undercover as a nanny in the Smith household, and sets out to evaluate the looks and character of the family's four daughters.

The richest woman in the world, Sarah, returns to the US to attend the wedding ceremony of her only son, Teddy But she‘s mistaken by Teddy's fiancée Lucinda as Teddy’s mistress, so Lucinda brutalizes Sarah, insults her, and takes indecent photos of her. Until Teddy arrives and furiously yells:Sarah is my mom!

Maid Hailey devotes her life to noble lady Natalie from childhood. The pair stand side by side through every hardship.Natalie rises to become empress of the Cafaro Empire, and Hailey becomes a high-ranking concubine who helps her rule the harem. At 60, Hailey suddenly travels to another era and becomes the Smith family's nanny's daughter.To her shock, Natalie Smith here, just brought home from the countryside, looks exactly like the empress she once served. Adopted girl Mila bullies Natalie cruelly, but Natalie cowers in fear, too timid to fight back. Hailey vows to help Natalie, take revenge on Mila and her unfair parents, and walk beside her into a new, bright life.

Kevin Lynch finds himself in a world of Mecha Maidens. Branded with F-rank Combat Aptitude, he's abandoned and targeted for his inheritance. He activates the Divine Modification System,upgrades the E-rank Mecha Maiden Ember Vale into a powerful fighter, and rises through the Mecha Competition. As the Mecha Ascension Cult's conspiracy unfolds, Kevin teams up with Ember and Kate Xavier to expose the truth and protect the world.