The series 'Genkaku Cool na Sensei ga Aheboteochi!' chronicles the complete sexual degradation of Saki, a stern and respected teacher known for her cool demeanor. Her life takes a depraved turn when a brazen student, Tanaka, uses a hypnosis app to shatter her will. What begins as minor hypnotic suggestions quickly escalates into a relentless campaign of mental and physical corruption. Viewers witness Saki's prim facade crumble as she is forced to perform increasingly humiliating and lewd acts right in the classroom. Tanaka's commands turn her into his personal fucktoy, her body contorting in pleasure and shame. The series meticulously details her psychological breakdown, her resistance futile against the app's power, until she is completely brainwashed. Her mind breaks, leaving only a drooling, cum-addicted slut with the iconic ahegao expression permanently etched on her face. She is utterly 'fallen,' a mindless piece of meat for her student's every perverse whim, her former self completely erased and replaced by an obedient, pleasure-seeking vessel.