悠木 倫

Rin is the older sister of Isamu. They live together in the same apartment. After breaking up with her second boyfriend, she decided to secretly get into the **** industry (because she loves sex), revealing it only to her younger brother.

Because she is getting a very good pay, she sometimes takes her brother out on weekdays in bars and other places. She really likes him, but only as a brother and nothing more. 

She even asks him to take part in a shoot as an extra or as her pretend boyfriend in a question-answer game or she would be "punished" if he answers wrong.

She doesn't know that her brother masturbates on her videos and fantasizes about her when they're together, until she caught him red-handed one day.

She really likes to shoot **** movies and can't stop doing it despite her brother's warnings.

In the sequel, she is now dating her cousin Michiyasu, with the intent to marry. She puts a facade whenever Michiyasu is with her to avoid disappointing him./