My room, which is always filled with AV, suddenly had my sister, a female college student, and her friends barge in! It seems her boyfriend only watches AV and doesn't satisfy her, so she was angry and curious, asking, 'Why do guys always watch AV like that!?' Initially, they were noisy, but when I thought they had quieted down, they were all glued to the AV! And instead of the male actor's penis, they were more fascinated by my own rock-hard, natural erection! The long-absent older sisters, overwhelmed by the eroticism, lashed out with excessive complaints, leading to a miraculous experience beyond the AV, filled with intense coupling!