FUTANARI BOYSH JOSHIUKOU NO OUJIASA
The popular girlfriend (♀) has a secret that she can't tell anyone: she has a huge penis (♂)!
She has a strong sex drive! She's a masturbation maniac who scatters loads of semen! Her younger sister, who goes to the same school, is always lending her pussy.
And now the girls at school have finally discovered her secret!? She gets a rock-hard erection from a handjob! She's tied up and has a masochistic ejaculation with a masturbator!
She's captivated by the insatiable penis and ends up in a harem situation!