Sumire works busily at a magazine editing production company, even bringing work home, leading to days filled with stress. One day, her younger brother Nozomu gathers members of his film research club at their house for a movie-making retreat. Sumire, seeking an outlet for her stress, goes out into the hallway unable to sleep and seduces one of her brother's friends, teasing him with edging and taking his virginity. Not satisfied with that, the next day she involves other friends and even her brother, taking everyone's virginity…
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