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I was suddenly transferred to a faraway place, so I decided to live for a while at my aunt Yumi's house, who lives in the neighborhood where I was transferred. However, Yumi was very serious and was always on edge, perhaps due to her job as a nurse, which meant she was under a lot of stress. But one day, I witnessed my aunt enjoying a vibrator after her night shift! I couldn't stand the unimaginable lewd behavior from my usually clean and strict aunt...