Hiroshi moves from the countryside to Tokyo to take a job examination. His aunt, whom he hasn't seen in a long time, holds a special place in his heart as someone he once admired. Kind and gentle toward him, Aunt Yasuko captivates Hiroshi completely—until one night, he accidentally catches her masturbating while distracted from her husband. After witnessing the incident, Hiroshi gradually becomes consumed by pent-up desire, eventually giving in to Yasuko's seduction.