yui misaki, a plain housewife, was working part-time cleaning at a hotel. one day, while cleaning, she finds a small can that someone dropped. inside was a white pill. yui secretly takes it home. that night, misaki was at a bar. she became curious and tried the pill. her body gets hot and she masturbates in the toilet. the next day, a black man comes looking for something he left behind. yui pretends she doesn't know. while drinking at the bar, a black man sits next to her. the man invites yui, saying, "i'll give you the drug if you help me with my work..."