I can't remember the name of this manga, I've tried google and searched around the forums. Hopefully someone here knows it.
Boy meets a famous artist, artist promises boy that he'd take him as a student and tells him to try for some art school. During the exam boy sits beside unmotivated girl, instead of doing the required art test, girl draws boy instead. Girl is an art genius, and is the daughter of the famous artist.

Love Allergy

.........Thank you, words can't begin to describe my gratitude. T.T