Kare ga Shoujo Manga wo Yomuriyuu

Rinko really loves Jun-kun, a manga hero! Yet when Shin - a total playboy and the type Rinko dislikes - makes fun of her, she decides to...?!

Also Chp.3 in Onnanoko wa Koi o Suru to Mousou Shichaun Desu (http://www.batoto.net/comic/_/comics/onnanoko-wa-koi-o-suru-to-mousou-shichaun-desu-r2201)