A shy but cute little sister named Azusa loves cosplay and has a perverted older brother who takes advantage of her by pretending to have a photoshoot while forcing her to perform lewd acts. He praises her verbally and teases her body with his hard cock, gradually getting her to expose herself more and more. Despite being completely trusting of him, she hesitantly follows his instructions to touch or suck on his erect penis when asked. However, when he finally enters her tight pussy, she becomes overwhelmed and doesn't know how to react properly. But despite her innocence, her body is already mature... She experiences multiple orgasms under her brother's relentless teasing and thrusting, proving that she's actually quite sensitive and responsive.
