A long-time neighbor, she had always been a friendly, approachable aunt figure to his son since childhood. To him, she was someone who naturally never attracted a man's gaze. Because of this, it was normal for her to be casually dressed in loose loungewear while doing housework at her front door. Her everyday appearance—semi-transparent blouses, undershirts with slightly visible nipples—was just a part of daily life for his son. Yet, as he kept seeing her like this, his heart unknowingly grew intensely aroused, his desire fully stirred without him even realizing it.