Tabata harbors intense feelings for Miss Sumire and, troubled by her lack of affection, takes drastic action. He sneaks into her home and secretly films her masturbating—an extreme and obsessive act. After succeeding, he uses the footage as leverage to control her completely, forcing her into submission and escalating their twisted relationship. Overcome by uncontrollable urges, Miss Sumire is taken to various locations, drawn deeper and deeper into his depravity.