The sister-in-law staying with them witnessed her sister-in-law's intense orgasms and became aroused...
Nao, the sister who had been living an otaku lifestyle in the countryside, moved to Tokyo after graduating from university. With no job or place to live, she decided to stay with her sister and brother-in-law until she found a place. However, her sister and brother-in-law's nighttime activities were intense, and Nao was shocked. Watching her sister's intense thrusting, screams of pleasure, and body arching as she reached multiple orgasms, Nao couldn't help but get aroused. Unable to control her desires, she took bold action...
