Rinka, a niece, is a daughter born to her childhood friend and older brother, who she once liked. As she grew up, her appearance and gestures became very similar to her childhood friend when she used to like her ... The weekend when Rinka came to stay for her runaway, As she was fishing in the closet, her aphrodisiac, which she had forgotten to have left, rolled on her floor, The moment she picks it up, her sudden devil throws it in.