My sister’s sexual life is completely unrestricted.

Natsumi is a 19-year-old female college student who attends a university in Tokyo. Her parents died early, leaving her with a lot of wealth. As a result, she lived in a luxurious apartment and enjoyed a comfortable life. Natsumi’s deceased mother was a well-known woman who had a lot of sexual experiences. Having inherited that trait from her mother, Natsumi also really enjoys sex. Currently, Natsumi’s favorite sex partner is Professor Ando, a handsome man who is also very popular on campus. The two of them spent their days having sex in Natsumi’s apartment.