Peach Heaven(2007)

Momoiro Heaven!

At first glance, Momoko Shiina may appear to be nothing more than your average high school girl, but she has a secret identity—as the famous erotica author "George Aihara"! After she witnesses an intimate moment between one of her teachers and the supermodel Ranmaru, she borrows a little too much from reality in an effort to beat the deadline on her latest story. When Ranmaru gets wind of this, he makes Momoko an offer she can’t refuse…

(Source: Kodansha USA)

Note: Includes the one-shot "Snap Beads"