Curious about why her best friend"s boyfriend left her for another man, the determined Eiya Arakawa proposes a sit‑down with them. At a coffee shop, Yuuga Oota consents to answer Eiya"s inquiries only if she can correctly deduce the status of a couple seated opposite them, which she accomplishes on her first try. Impressed by her sharp mind and instinct, he invites her to a confidential session where he explains the Slave Control Method, or SCM—a binding device that can subjugate people.
When two SCM wielders clash, the gadgets impose a strong neurological effect. After the contest ends, the SCM magnifies the loser"s sense of duty and compels them to obey the victor. Eager to prove his own prowess, Yuuga requests that Eiya serve as a safety net should he ever fall under the device"s sway. With ten million yen granted, Eiya"s task is to persuade Yuuga"s prospective master to release him from bondage. Though initially reluctant, Yuuga"s remarks echo her own longing for more in life, and she accepts his proposal. Yet when a shadowy syndicate rapidly gathers slaves, Eiya finds herself embroiled in a perilous plot far beyond her imagination. The escalating stakes force her to confront hidden truths about power, loyalty, and the cost of freedom. She realizes that every choice could ripple through the underground network, reshaping destinies and challenging control deeply.
