Care for a Beauty?

(from ebookjapan):
A boyish girl who wants to be beautiful! Sunny, a 16-year-old high school student, looks and acts like a boy, probably because she grew up surrounded by her four older brothers. Her older brothers are worried about her and start a plan to change Sunny's appearance and personality!　However, the road ahead is not easy... Sunny is provoked by her classmate Marion, with whom she clashes about everything, and decides to apply to be a poster model!