Manami had found fulfillment in becoming the teacher her students admired, but one night, her student Umeno visited her home and attempted to confess his feelings. Finding his behavior inappropriate, she rejected him and sent him away. Later that night, consumed by rage, Umeno returned with his friends and invaded Manami's home, taking it over by force. From that moment on, Manami's life changed completely as she was thrust into an unimaginable situation, becoming their captive and toy.