Ayaka Tomoda, a dedicated female teacher who lived by her sense of justice and conviction, finds her life as an educator threatened when a villain discovers her secret romantic relationships. Feeling she can only save herself by obeying her students' commands, she abandons her psychological defenses. Her body is forcibly used against her will, her anal reactions recorded as part of ongoing mental torment. Ayaka is driven into a hellish existence, forced to endure each agonizing day in silence.