Yumemi is a young girl working day and night to repay her father's debt. One night, while working at a bar, she collapses from exhaustion and is introduced by the manager to a mysterious individual. Desperate and clinging to any hope, she visits him and is offered a deal: her debt will be cleared in exchange for signing a six-month slave contract. Trapped with no way out, she resolves herself to endure it. As a slave, she undergoes intense training tailored to fulfill her master's unique desires. Over the grueling days that follow, her mind and body begin to change, molded by bondage, whipping, pissing, and complete submission. Under the Violent Restraint label from Aiena G, this Demon Restraint: Sybian Training release follows Yumemi's transformation into a true sex slave and cumdump, broken and reborn through extreme BDSM and tight bondage.