Tokimeki no Ikenie

This is a story about Mari, a modest and inconspicuous girl who dreams of becoming a manga artist. Born into a complicated family, she lives a modest school life while hanging onto her dream. One day, after saving Shigeru Hanamizuki, the most popular boy in class, from a traffic accident, he confesses to her. However, Mari turns him down because of certain circumstances...

(Source: Comic Natalie, translated)