[Inoue Kiyoshirou] Beginnings of the End (No Mercy)

A driven office manager bets everything on landing the perfect project, but her smug rival flips the negotiation into a trap—buckling a collar around her throat and making it clear her freedom 'depends on your answer.' Pinned down and broken in with relentless nakadashi, the proud businesswoman is reduced to tears and obedience while his camera quietly collects leverage. Five days later she's vanished from the office, and a glowing monitor in the break room holds the proof of exactly what happened to Manager Sawamura.