In a dystopian near-future Japan where demons (魑魅魍魎) roam freely and the ancient non-interference pact with humans has collapsed, corrupt forces thrive in the shadows. The government counters this by creating the Taimanin, elite ninjas trained to combat demonic threats. Igawa Asagi, the legendary leader and strongest Taimanin, infiltrates Tokyo Kingdom—a derelict island in Tokyo Bay—to hunt a demon collaborator. Unbeknownst to her, it's a meticulously laid trap orchestrated by Oboro, a former ally consumed by hatred and obsession toward Asagi. Asagi, along with her sister Sakura and comrade Murasaki, falls into the ambush and is captured. Bound and subjected to brutal demonic torment, the trio is transformed into mindless flesh dolls—sex slaves for the demonic horde. This OVA, a spin-off/remake drawing heavily from Taimanin Asagi 3, focuses intensely on Asagi's breaking, featuring relentless training, humiliation, and corruption scenes involving tentacles, monsters, and Oboro's personal vendetta (with Ingrid also appearing). Over 90% of the content is explicit adult scenes, emphasizing psychological and physical domination in a dark, chaotic world where justice succumbs to depravity.