[Reducing Mosaic]KTRA-561 Despite appearances, my sister is a total slut who can't resist the desires of guys with ulterior motives and just goes along with them. Kotoneka

Hanachan is a quiet girl who is the model student type. But she's also of age and actually very interested in dirty things... One day, her brother suddenly comes into her room and shows her porn videos, making her feel all hot and bothered. Her brother, who only has dirty thoughts in his head, notices her condition and approaches her with his intentions clear as day! Hanachan, whose curiosity about sex wins out, desperately tries to hold back the erotic desires of boys her age!