[MrTerrorist]

From Nagareboshi Manga:

In class, she's a sort of zoned-out girl, and he's the year one class' most perfect, good-looking guy.
But the two of them have a secret, and their extraordinary "love experience" will start now!

Spoiler for Chapter 1:

Basically it's a story about a girl famous for her quiet & cold attitude who's secretly a famous cellphone novelist who unknown to her classmates, they are the inspiration of her characters in her stories. Her fans want more stories about love, but it's a genre she's not familiar with since she's has never been in love before. In order to gain experience, she blackmails the most popular boy in school whose' secretly a playboy who plays with all of the girls hearts to be her "boyfriend". Not wanting to have his nasty secret expose, he reluctantly agrees.

When i first found out about this manga, it look kinda interesting so i decided to read the 1st chapter. After reading it, i have to say it's a very good story. I love the lead female since she's cute & her attitude & cold nature was very funny.
I think i going read more of this very cute love story.