Dorei-ku The Animation  

奴隶区 我与23人的奴隶, Doreiku: Boku to Nijuusannin no Dorei, Dorei-ku: Boku to 23-nin no Dorei, 23 Slaves and Me, 奴隷区 The Animation, Doreiku - Boku to Nijuusannin no Dorei

Eiya Arakawa, being the curious person that she is, wants to know why her best friend's boyfriend left her for another man. To get answers, she suggests meeting with them at a café. Yuuga Oota agrees to answer her questions only if she can correctly identify the relationship of a couple sitting across from them, which Eiya does on her first try. Impressed by her intelligence and intuition, Yuuga invites her for a private meeting where he introduces her to the concept of Slave Control Method (SCM), a device that turns people into slaves when two users engage in a duel. The loser's sense of obligation is amplified, forcing them to obey the winner. Yuuga asks Eiya to act as his insurance if he becomes a slave. She gets access to 10 million yen and her task is to convince his would-be master to free him from servitude. Although hesitant at first, Eiya agrees to his request. However, things take an unexpected turn when a mysterious organization starts rapidly accumulating slaves. Eiya finds herself in a dangerous game that she never imagined.