JUFE-044 A defenseless big-breasted sister gets fucked by her super-obsessed younger brother. She thought she was trying to seduce her virgin brother, but... it turns out to be a complete reversal! - Nanami Matsumoto

Nanami, an idol in Tokyo, returns home and hears from her mother that her younger brother has been acting strange lately. When she asks him directly why, she says it's because a girl in his class made fun of him for being a virgin. - My father also asked me to cheer him up, so I let my brother touch my breasts to teach him how good girls are... Suddenly, Nanami seemed to have woken up to something and started massaging his cock, which became fully erect. - Raw insertion! - After that, my younger brother chased me around all the time and begged me to mate with him everywhere in the house...