DINB-001: Deep Bondage Torture Legend Act 1 – Female Spy Humiliation, Intense Fire, Demoness of the Underworld, SM Bondage, Other Maker (DVD), Drill Aunt Insult, Actress, Obasan

A female spy codenamed 'Mayu' belongs to 'Butterfly,' a secret female interrogation unit established by a special task force to stop heinous sex crimes. Outwardly, she appears to be an ordinary, innocent-looking college girl. In reality, she is highly skilled and excels in infiltration, having successfully dismantled numerous criminal organizations. Now, she finds herself caught in a cruel incident. Can Mayu endure the relentless torture and interrogation of the underworld?