The sister who works at an advertising agency is a cute woman who looks good in glasses. During interviews, she gets excited talking about her favorite idols and amusement parks, but when exposed to an electric stimulator, she becomes instantly wet in her panties in a lewd manner. During a massage, both her body and her vagina are relaxed, and when she is penetrated by a thick meat rod, she gasps, "More, please..." Next, after being blindfolded and restrained, she is teased by three men and sprays a large amount of ejaculate. Finally, she is repeatedly penetrated by different cocks, reaching orgasm multiple times.