Takurou Yamazaki, a 42-year-old salaryman, died from karoushi due to his intense work dedication. A temporary staffing agency retrieved his body and transferred his brain into an advanced android form, reviving him as their corporate asset.

As an android, Yamazaki possesses superhuman analytical and physical capabilities. Leased for corporate espionage or business consultation, he functions as a machine-like instrument. His rigid, emotionless demeanor, obscured eyes behind glasses, and unchanging business suit reflect this existence. He consciously avoids human connections, striving for emotional detachment.

Assigned to Itsutsuba Electrics to develop a competitive telephone, Yamazaki identifies a market niche, proposing a voice-operated, wall-mounted LCD panel telephone. During this assignment, he encounters Kashima Rinko, a 16-year-old runaway. Despite his efforts to remain detached, Rinko persistently inserts herself into his life. Her emotional vulnerability contrasts sharply with his calculated coldness.

Yamazaki experiences severe headaches, later identified as physiological rejection: his remaining organic brain tissue conflicts with the mechanical systems, symbolizing the struggle between his lingering humanity and engineered purpose. This conflict intensifies when rival corporate cyborg Suzuki threatens Rinko. Yamazaki intervenes to protect her, an act demonstrating his cultivated detachment is not absolute. His protective actions reveal latent human instincts beneath his mechanical facade.

Yamazaki's journey illustrates the tension between his programmed function as a corporate weapon and his residual human identity. Protecting Rinko signifies an unconscious reclaiming of emotional connections and personal values he sought to suppress, highlighting his existence caught between corporate utility and fading humanity.